INSEPARABLE
ADJECTIVES
► CLOSE AS STINK ON SHIT very close; intimate, inseparable → 2000 US sl. (Bk.)
► NAVEL-TIED inseparable → 1767 sl.
► THICK AS THIEVES in close association, familiar, intimate, inseparable → 1833 UK sl.
► UNDEPARTABLE inseparable; indivisible → c1374 obs.
Lexicophilia 