Reverse Dictionary: INDESCRIBABLE

ADJECTIVES
SUPERINENARRABLE utterly indescribable → 1873
UNANEMNED unnamed, indescribable → c1175 obs.
UNTALELICH indescribable → a1225 obs.
UNZYGINDE indescribable → 1340 obs.

NOUNS
JE NE SAIS QUOI an indescribable or inexpressible something → 1656
KNOW-NOT-WHAT an indescribable thing; a whatchamacallit → a1642