to mark off, to demarcate, to delimit / 句切る: to punctuate; to put an end to (e.g. a sentence); to insert pauses or breaks (e.g. when reading aloud)

Alternative form of コンマ

to use / to employ / to make use of, to apply / to spend

file (collection of papers) / (computing) file

(computing) a filename

(computing) text file

"Clear file folder", a simple plastic sleeve (perhaps only somewhat opaque when a design is printed on it, as is common in promotional events) for holding documents, open on two consecutive sides and closed on two consecutive sides.

use one thing for many purposes / work someone hard

to use one's head

a letter, a character (symbol for a sound or a word) / (linguistics) script, writing system / (specific to Japanese) a written mora, a kana / writing in general, written words