complex (not simple or straightforward)

needed, necessary

need, necessity

question, problem on homework etc. / a question; a matter (of time etc.) / a problem (something that needs to be dealt with); a trouble / an issue; a matter

(typography) character composition (arrangement and spacing of characters so that they are distributed in a body of text correctly, according to typographic rules)

(typography, printing) solid composition (text composition with no spacing)

Alternative spelling of 組文字

horizontal typesetting

vertical typesetting

necessary evil