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Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

noun any instruction that works first one way and then the other; it turns something on the first time it is used and then turns it off the next time
noun a hinged switch that can assume either of two positions
noun a fastener consisting of a peg or pin or crosspiece that is inserted into an eye at the end of a rope or a chain or a cable in order to fasten it to something (as another rope or chain or cable)

Of uncertain origin. Possible alteration of tug (“to pull”) + -le

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