This is the 2980th most frequent Japanese word.
ツン
"ツン" refers to a cold, aloof, or prickly attitude or demeanor.
ツンとした refers to a sharp or aloof attitude.
彼女はいつもツンとした態度を取る。
She always takes a sharp attitude.
ツンときた describes a sharp sensation experienced, often in the nose.
その花の香りが鼻にツンときた。
The scent of that flower hit my nose sharply.
ツンとくる can also express a piercing effect, figuratively or emotionally.