early 15c., "take possession of," from Late Latin appropriatus, past participle of appropriare, adpropriare (c.450) "to make one's own," from Latin ad- "to" (see ad-) + propriare "take as one's own," from proprius "one's own" (see proper). Related: Appropriated; appropriating.

"specially suitable, proper," early 15c., from Latin appropriatus, past participle of appropriare (see appropriate, v.). Related: Appropriately; appropriateness.