Answer
Set off
Set off verb - To cause to function.
Answer and set off are semantically related in compensate topic. Sometimes you can use "Answer" instead a verb "Set off".
Both terms in one sentence
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Robert Webb who, on his appearance in series H, called a helix a spiral (despite knowing the correct answer) just so he could set off the klaxon.
Source: Series / QI - In QI, when there's a really obvious answer that no-one wants to say because it's one of Stephen's "heffalump traps", but nobody can think of any other answers, a contestant will sometimes say the obvious answer knowing it'll set off the klaxon and lose them points, just to break the tension.
Source: Trap Is the Only Option - Then they turned a Jerk Jock into a feral gorilla, then were going to set off a bomb to mutate the entire school into anthropomorphic animals as their answer to the fact the school was going to test the students to see who had been using the mutagen.
Cite this Source
Set off and Answer. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/answer/set_off
Answer & Set off. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/answer/set_off>.
Set off or Answer. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/answer/set_off.
Google Ngram Viewer shows how "answer" and "set off" have occurred on timeline