IPA: /ˈtrɪmɪst/
KK: /trɪmɪst/
The smallest or most slender in size or shape, often referring to someone who is fit or has a well-defined physique.
She is the trimmest athlete on the team, always maintaining a healthy diet and exercise routine.
Comparative: trimmer
Superlative: trimmest
Trimmest is formed from "trim" (from Old English *trymman*, meaning to make neat or tidy) and the superlative suffix "-est" (meaning most). The word "trimmest" refers to the state of being most neat or tidy.
Think of making something neat or tidy ('trim') and then adding '-est' to show it is the most neat or tidy.