IPA: //ʌnˈsiːmli//
KK: /ʌnˈsimli/
This word describes something that is very inappropriate or not proper, especially in a social context.
His behavior at the formal event was the unseemliest I had ever witnessed.
Comparative: more unseemly
Superlative: unseemliest
Unseemliest → It is formed from "un-" (meaning not) and "seemly" (from Old English "seemlic", meaning proper or fitting) and the suffix "-est" (indicating the superlative form). The word "unseemliest" means the most improper or least fitting.
Think of 'not' ('un-') being added to 'proper' ('seemly') to describe something that is the least proper or fitting.
No commonly confused words.