inaceptable
/inaθebˈtable/ · B2 · adj
unacceptable
🚫 in- (not) + aceptable = not acceptable; sounds like in-ace-ept-able
Spanish inaceptable is built from in- (not) plus aceptable (acceptable). The prefix in- works like English un-/in-, so the word reads as not able to be accepted. Same Latin root as English accept and inadmissible-type negatives.