GUESSTIMATE

PRONUNCIATION: (GES-ti-mayt for verb; -muht for noun)

MEANING: verb tr.: To make an estimate based on guesswork.
noun: An estimate based on guesswork.

ETYMOLOGY: A blend of guess + estimate. Earliest documented use: 1936.
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GUESTIMATE - try to figure out how many are coming for dinner

GUESS TIME ATE - ...and how long it took to eat it

GUESSTIVATE - how long should my summer vacation be?