きつく

tightly, firmly, harshly, severely

→ きつい
きつ tough, strenuous + く Adverbial form
adjective Rare #29,330
tightly, firmly Adverbial form of きつい; often describes holding, closing, or applying something tightly.
JA: ふたをきつく閉めてください。
EN: Please close the lid tightly.
harshly, severely Can describe treating or speaking to someone in a strict or harsh way.
JA: 彼は部下にきつく言った。
EN: He spoke harshly to his subordinate.
Forms of きつい

彼女は私に対しとてもきつくあたる。

She treats me very harshly.

父は、お金を貸すなと、それはそれはきつく言い聞かせていた。

My father had sternly warned me never to lend money.

トムはメアリーをきつく抱きしめた。

Tom hugged Mary tightly.

彼女の結び目は私のよりきつく、使う糸も少なかった。

Her knot was tighter than mine, and she used less thread.

今きつくしてやる

I'll make it nice and tight for you now.

— 続・夕陽のガンマン (1966)