UNMISTAKABLE
unmistakable
(adjective) clearly evident to the mind; “his opposition to slavery was unmistakable”
apparent, evident, manifest, palpable, patent, plain, unmistakable
(adjective) clearly revealed to the mind or the senses or judgment; “the effects of the drought are apparent to anyone who sees the parched fields”; “evident hostility”; “manifest disapproval”; “patent advantages”; “made his meaning plain”; “it is plain that he is no reactionary”; “in plain view”; “a palpable lie”
Source: WordNet® 3.1
Etymology
Adjective
unmistakable (comparative more unmistakable, superlative most unmistakable)
Unique, such that it cannot be mistaken for something else.
Antonym: mistakable
Source: Wiktionary
Un`mis*tak"a*ble, a.
Definition: Incapable of being mistaken or misunderstood; clear; plain;
obvious; evident.
– Un`mis*tak"a*bly, adv.
Source: Webster’s Unabridged Dictionary 1913 Edition