All 50 Uses

however
in
The Lost Symbol
(Edited)

Tonight, however, like the brethren bearing witness, he was dressed as a master.
Chpt Prol.

however = a word used to connect contrasting ideas as when using though, in spite of that, in contrast, nevertheless, etc.
The truth, however, was stranger still.
Chpt Prol.
Tonight, however, he sensed a foreboding solemnity in the Temple Room, and his mind began replaying all the dire warnings he had been given on his journey, threats of terrible consequences if he ever shared the ancient secrets he was about to learn: Throat cut from ear to ear …. tongue torn out by its roots …. bowels taken out and burned …. scattered to the four winds of heaven …. heart plucked out and given to the beasts of the field— "Brother," the gray-eyed master said, placing his…
Chpt Prol.
This morning, however, he was surprised to see the blinking red light on his voice-mail display.
Chpt 3-4
It was not Peter Solomon's brilliance, however, but the humility in his gentle gray eyes that had given Langdon the courage to write him a thank-you letter.
Chpt 3-4
Mal'akh's slouching posture and padded belly had hidden his true physique, while the makeup on his face and hands had hidden the tattoos that covered his body. The true genius, however, was the sling, which disguised the potent object Mal'akh was transporting into the building.
Chpt 3-4

however = though (used to connect contrasting ideas)
Tonight, however, science was the last thing on her mind.
Chpt 5-6

however = a word used to connect contrasting ideas as when using though, in spite of that, in contrast, nevertheless, etc.
No legends were as enduring, however, as the claims of thirteen different ghosts that haunted this building.
Chpt 5-6
Masonry, however, is batting zero for three.
Chpt 5-6
This handequin, however, had been positioned with its index finger and thumb pointing up toward the ceiling.
Chpt 9-10
The tattoos, however, were not what held Langdon's attention.
Chpt 9-10
Tonight, however, the pulsing had her on edge.
Chpt 11-12
One day soon, however, Katherine knew she would publish some of the most transformative scientific revelations in human history.
Chpt 11-12
Tonight, however, a troubled thought followed her inside.
Chpt 11-12
Tonight, however, there was only chaos.
Chpt 13-14
The most astonishing aspect of Katherine's work, however, had been the realization that the mind's ability to affect the physical world could be augmented through practice.
Chpt 15-16
As she rounded the corner, however, she spotted something unexpected across the lab.
Chpt 17-18
Today, however, with the Internet, the World Wide Web, and the ongoing digitization of the great libraries and museums in the world, Katherine's goal could be achieved by using a relatively simple search engine equipped with an army of translation modules and some well-chosen keywords.
Chpt 17-18
Brumidi, however, immigrated to America in 1852, abandoning God's largest shrine in favor of a new shrine, the U.S. Capitol, which now glistened with examples of his mastery—from the trompe l'oeil of the Brumidi Corridors to the frieze ceiling of the Vice President's Room.
Chpt 21-22
As American religious ideals changed, however, the joking criticism turned to controversy, and the statue was removed, banished to a shed in the east garden.
Chpt 21-22
As I mentioned, however, Peter told me he did know.
Chpt 21-22
Clearly, however, Katherine's brother had told her nothing of what he had been guarding all these years.
Chpt 23-24
Now, however, it seemed that the quantity of searchable digital material in the world had exploded to the point where someone could find literally anything.
Chpt 25-26
At the moment, however, he had to buy time to think.
Chpt 25-26
The flashlight beam, however, was impeded by a heavy wooden door.
Chpt 35-36
Unlike the ancient passetto, however, this passage was modern and not yet complete.
Chpt 41-42
At the moment, however, Katherine had a cell phone pressed to her ear while she was dashing blindly along the endless length of carpet.
Chpt 45-46
Right now, however, her fear had turned her mind into a tumbling torrent of panic and confusion.
Chpt 47-48
Now, however, back in the basement police headquarters, Nuñez could see the storm clouds gathering fast.
Chpt 47-48
However, both the Ancient Mysteries and Masonic philosophy celebrate the potentiality of God within each of us.
Chpt 49-50
However, the cleartext is meaningless.
Chpt 49-50
In this case, however, Katherine's mother argued that it was dangerous to give Peter's troubled son such a large sum of money.
Chpt 51-52
Two days later, however, Peter received a horrifying international phone call.
Chpt 51-52
Mal'akh had planned for this contingency, however.†
Chpt 51-52

however = a word used to connect contrasting ideas as when using "though", "in spite of that", "in contrast", "nevertheless", etc.
Tonight, however, the pieces have come dangerously close.
Chpt 53-54

however = a word used to connect contrasting ideas as when using though, in spite of that, in contrast, nevertheless, etc.
As the years passed, however, Andros's sexual adventures began to lose their thrill.
Chpt 57-58
Bellamy did not guide them into the stacks, however.†
Chpt 59-60

however = a word used to connect contrasting ideas as when using "though", "in spite of that", "in contrast", "nevertheless", etc.
This house, however, was silent.
Chpt 59-60

however = a word used to connect contrasting ideas as when using though, in spite of that, in contrast, nevertheless, etc.
As she did so, however, she spotted something she had missed earlier—a tiny speck of bluish light on the back of the house.
Chpt 59-60
That, however, had taken place among trusted friends.
Chpt 61-62
However, if it does exist …. perhaps it's time to unveil it.
Chpt 61-62
This reading, however, in addition to being self-evident, seemed unlikely for another reason.
Chpt 63-64
Tonight, however, he was apparently in a hurry to get inside and return Warren Bellamy's phone call.
Chpt 67-68 *
His second reaction, however, was alarm.
Chpt 73-74
Tonight, however, lit only by moonlight, the Jungle terrified him.
Chpt 73-74
Tonight, however, there are forces at work that I fear you have not yet grasped.
Chpt 73-74
Now, however, Langdon seemed to have grasped her meaning.
Chpt 75-76
By the time Simkins reached the second-to-last car, however, he was feeling edgy.
Chpt 77-78
As he leaned forward, however, he could see that the bulb was illuminated, emitting a dull red glow.
Chpt 79-80
This visible cellar, however, was only a portion of Mal'akh's underground space.
Chpt 81-82

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Grouped by 3 Meanings

Definitions:

(1) (however as in: However, complications may...)
though (or another expression that connects contrasting ideas)

Based on idea 1 we might not expect idea 2, but this is a way of saying that even though idea 1 exists, we still have idea 2. Synonyms include in spite of that, despite that, nevertheless, nonetheless, on the other hand, in contrast and but.
(2) (however as in: However much she tried...)
to whatever degree (regardless of how much; or whatever unspecified amount)
(3) (however as in: However you do it, get it done!)
in whatever way
(4) (meaning too rare to warrant focus)
Much more rarely (and arguably incorrectly), however can be used to intensify the word how, as when one says "However did you find her?" Grammarians would suggest using two words for that usage: "How ever did you find her?"

however in The Lost Symbol (Edited)

however
in
The Lost Symbol
(Edited)