All 5 Uses

speculate
in
The House of the Spirits
(Auto-generated)

After a week with no word from the flying uncle, people began to speculate that he had gone so high that he had disappeared into outer space, and the ignorant 'suggested he would reach the moon.†
Chpt 1
Despite the care Severe took to hush all speculation, Rosa's death became a public scandal.†
Chpt 1
It was around that time that I began speculating in the stock market, and I spent hours studying the ups and downs of international finance.†
Chpt 4 *
He was very busy with his politics and his business, traveling constantly, financing new political campaigns, buying land and tractors, raising race horses, and speculating on the price of gold, sugar, and paper.†
Chpt 10
The black-market came to an end at the very moment when the Presidential Palace was bombed, because speculators were threatened with martial law and execution by firing squad.†
Chpt 13 *

Definitions:

(1) (speculate as in: don't know, but I'll speculate)
to think about, wonder, guess or theorize with much uncertainty
(2) (speculate as in: speculate in the stock market)
to take a risk for profit--typically a risky investment
(3) (meaning too rare to warrant focus)
Much more rarely, speculation can refer to a gambling card game that was popular in the past.