(たか)(くく)

たかをくくる
expression
to underestimate; to take lightly
1. to underestimate; to take lightly; to not take seriously
To assume something is not a big deal and underestimate its importance or difficulty. Often used when someone's casual attitude leads to unexpected trouble.
(たか)(くく)っていた。
I underestimated it.
試験(しけん)(たか)(くく)って()ちた。
I took the exam lightly and failed.
台風(たいふう)()ると()いても(たか)(くく)っていたが、被害(ひがい)予想以上(よそういじょう)だった。
Even after hearing a typhoon was coming, I didn't take it seriously, but the damage was worse than expected.

(たか) here means the extent or amount of something, and (くく)る means to bundle or estimate. The idiom literally means "to estimate the total as small" — to assume something is not a big deal.

COMMON FORMS:

  • (たか)(くく)って: underestimating (て-form, most common)
  • (たか)(くく)っていた: was underestimating (past progressive)
  • (たか)(くく)る: to underestimate (dictionary form)

USAGE:
Almost always used when the underestimation leads to trouble or a bad outcome. Carries a tone of regret or criticism. Often used with と or が to explain what went wrong.

COMMON PATTERNS:

  • 〜を(たか)(くく)って失敗(しっぱい)した: underestimated ~ and failed
  • (たか)(くく)っていたら大変(たいへん)なことになった: because I underestimated it, things got serious

SIMILAR EXPRESSIONS:

  • (あま)()る: to underestimate, take lightly (more casual)
  • (あなど)る: to look down on, underestimate (literary)
  • 油断(ゆだん)する: to let one's guard down