IPA: /ˌʌnɪmˈpoʊzɪŋ/
KK: /ʌnɪmˈpoʊzɪŋ/
Not having a strong or impressive appearance; not grand or significant.
The building was unimposing, blending in with the smaller structures around it.
Unimposing → It is formed from "un-" (meaning not) and "imposing" (from Latin "imponere", meaning to place upon or to put in). The word "unimposing" means not imposing or not having a strong presence or impact.
Think of 'not' ('un-') being combined with 'placing' ('imponere') to remember that unimposing describes something that does not stand out or make a strong impression.