Princeton's WordNet

1. unmistakable(adj)

   clearly evident to the mind

   "his opposition to slavery was unmistakable"

2. apparent, evident, manifest, patent, plain, unmistakable(adj)

   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"

Kernerman English Learner's Dictionary

1. unmistakable(adjective)ˌʌn mɪˈsteɪ kə bəl

   obvious and not easily thought to be sth or sb else; = distinctive

   the unmistakable sound of breaking glass

Wiktionary

1. unmistakable(Adjective)

   unique, such that it cannot be mistaken for something else.

Webster Dictionary

1. Unmistakable(adj)

   incapable of being mistaken or misunderstood; clear; plain; obvious; evident

• duidelik, ontwyfelbaarAfrikaans
• واضِح، لا يَدَعُ مجالا للشَّكArabic
• несъмненBulgarian
• inequívocoPortuguese (BR)
• nepochybnýCzech
• unmißverständlichGerman
• ikke til at tage fejl afDanish
• σαφέστατος, αδιαμφισβήτητοςGreek
• inequívocoSpanish
• ilmneEstonian
• غیر قابل تردید؛ محرزFarsi
• päivänselväFinnish
• clair; indubitableFrench
• שֶׁאֵין לִטעוֹת בּוֹHebrew
• सुस्पष्टHindi
• nepogrešivCroatian
• félreérthetetlenHungarian
• jelas sekaliIndonesian
• augljóslegaIcelandic
• chiaro, indubbioItalian
• 明白なJapanese
• 명백한Korean
• aiškus, su niekuo nesupainiojamasLithuanian
• nepārprotams; nekļūdīgsLatvian
• memang jelasMalay
• onmiskenbaarDutch
• umiskjennelig, tydelig, ufeilbarligNorwegian
• niedwuznacznyPolish
• غیر قابل تردید؛ محرزPersian
• بې غلطۍ ، بې خطا، څرګند ښكارهPashto
• inequívocoPortuguese
• clar; indubitabilRomanian
• очевидныйRussian
• nepochybnýSlovak
• jasenSlovenian
• nepogrešivSerbian
• omisskännlig, tydligSwedish
• ที่ไม่ผิดพลาดThai
• anlaşılmaması olanaksız, çok açıkTurkish
• 顯而易見地，不可能弄錯的Chinese (Trad.)
• безпомилковий, очевиднийUkrainian
• ناقابل خطاUrdu
• không thể nhầm lẫnVietnamese
• 显而易见的，不会弄错的Chinese (Simp.)