"attached so as to hang down, suspended in air," past-participle adjective from

hang

(v.). Meaning "furnished with hangings" is from 1640s; meaning "having (impressive) male genitals" is from 1640s, originally often of animals; of a jury, "unable to agree," 1838, American English.

Hung-over

(also

hungover

) in the drinking sense is from 1950 (see

hangover

).

Hung-up

is from 1878 as "delayed;" by 1961 as "obsessed."