IPA: /ˈɡæpiəst/
KK: /ˈɡæp.i.ɪst/
Having the most gaps or spaces; characterized by a significant number of openings or voids.
The gappiest part of the fence allowed the rabbits to escape easily.
Comparative: gappier
Superlative: gappiest
Gappiest is formed from "gap" (from Old Norse "gapa", meaning to yawn or open wide) and the suffix "-iest" (meaning most). The word "gappiest" describes something that is the most open or wide, often used to refer to a person or thing that has the largest gap or opening.
Think of the word 'gap' meaning an opening, and remember that 'gappiest' refers to having the most open space or the largest gap.