IPA: /ˈruːmiːst/
KK: /ˈrumɪst/
Having the most space or capacity; very spacious.
This is the roomiest apartment I've ever lived in.
Comparative: roomier
Superlative: roomiest
Roomiest → It is formed from "room" (from Old English *rum*, meaning space or area) and the suffix "-iest" (meaning most). The word "roomiest" means having the most space or area.
Think of 'room' as a space and remember that 'roomiest' means having the most space.
No commonly confused words.