Kyūjitai form of 函数 (“function”)

Kyūjitai form of 波動函数

to express, to say in words, to put into words

to show, to make apparent / to express, to put into words / to signify, to represent, to symbolize, to stand for

a box-shaped receptacle, e.g. a coin bank or letter box (e.g. 銭函, 投函する) / to insert [into a container] (cf. 入れる, 容れる) / a suit of armor (more commonly 鎧)

(adverbial particle, dismissive, derogatory) emphasizes disgust, contempt, or otherwise negative feelings of the speaker: whatever

whatchamacallit, X

count / number

What? What did you say?

anything; whatever one likes