hairpiece

thin / (figuratively) thin, weak, diluted

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

(colloquial) a girlfriend (a female partner in a romantic relationship)

(formal) Female third-person singular pronoun; she, her, girlfriend

(literary) they (about women or girls)

hair on the head

hair

(slang, euphemistic) doujinshi, especially those with adult themes

use one thing for many purposes / work someone hard