Princeton's WordNet

1. apprehensible, intelligible, graspable, perceivable, understandable(adj)

   capable of being apprehended or understood

Kernerman English Learner's Dictionary

1. understandable(adjective)ˌʌn dərˈstæn də bəl

   easy to understand; = reasonable

   It's understandable that you're afraid.

2. understandableˌʌn dərˈstæn də bəl

   able to be understood

   He spoke with an accent that was barely understandable.

Wiktionary

1. understandable(Adjective)

   Capable of being understood; comprehensible

2. understandable(Adjective)

   Capable of being accepted or excused under the circumstances

Webster Dictionary

1. Understandable(adj)

   capable of being understood; intelligible

• verstaanbaarAfrikaans
• مُمْكِن فَهْمُهArabic
• разбираемBulgarian
• compreensívelPortuguese (BR)
• pochopitelnýCzech
• verständlichGerman
• forståeligDanish
• κατανοητός, ευνόητοςGreek
• comprensibleSpanish
• mõistetavEstonian
• قابل درکFarsi
• ymmärrettäväFinnish
• compréhensibleFrench
• שֶׁנִיתַן לְהָבִינוֹHebrew
• जिसे समझा जा सकेHindi
• shvatljiv, razumljivCroatian
• érthetőHungarian
• bisa dipahamiIndonesian
• skiljanlegurIcelandic
• comprensibileItalian
• 理解できるJapanese
• 이해할 수 있는Korean
• suprantamasLithuanian
• saprotamsLatvian
• boleh difahamiMalay
• begrijpelijkDutch
• forståeligNorwegian
• zrozumiałyPolish
• قابل درکPersian
• دپوهيدو وړ، دپيژندو وړPashto
• compreensívelPortuguese
• comprehensibil, de neînţelesRomanian
• понятныйRussian
• pochopiteľnýSlovak
• razumljivSlovenian
• razumljivSerbian
• förståeligSwedish
• ที่สามารถเข้าใจได้Thai
• anlaşılırTurkish
• 可以理解的Chinese (Trad.)
• зрозумілийUkrainian
• سمجھنے کے قابلUrdu
• có thể hiểu đượcVietnamese
• 可以理解的Chinese (Simp.)