All 5 Uses

distinct
in
The Mysterious Benedict Society
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Sticky, as if someone had pulled a string in his back, promptly answered, "To make so confused or opaque as to be difficult to perceive, or to otherwise render indistinct."†
p. 99.4 *

indistinct = not clear or easily identifiable

standard prefix: The prefix "in-" in indistinct means not and reverses the meaning of distinct. This is the same pattern you see in words like invisible, incomplete, and insecure.
He had the distinct feeling that something between them had changed — as if he had passed a test.†
p. 237.9

distinct = clear, easily noticed, and/or identifiable as different or separate
The boys got the distinct feeling that if they didn't have questions, he would be most displeased.†
p. 320.2
He must face the worst, and indeed it was with a distinctly quavering voice that Sticky spoke his reply to the Whisperer's unspoken question.†
p. 327.9

distinctly = in a manner that is clear, easily noticed, and/or identifiable as different or separate
Printed in distinctive, awkward handwriting, it read: LOSE the new code?†
p. 340.4

distinctive = clear, easily noticed, and/or identifiable as different or separate -- sometimes to indicate a difference that is excellent

Definitions:

(1) (distinct)
clear, easily noticed, and/or identifiable as different or separate
(2) (meaning too rare to warrant focus)