"fittest" in the adjective sense
1. fit
meeting adequate standards for a purpose
"a fit subject for discussion"
"it is fit and proper that you be there"
"water fit to drink"
"fit for duty"
"do as you see fit to"
2. fit, primed, set
usually followed by `to' or `for') on the point of or strongly disposed
"in no fit state to continue"
"fit to drop"
"laughing fit to burst"
"she was fit to scream"
"primed for a fight"
"we are set to go at any time"
3. fit
physically and mentally sound or healthy
"felt relaxed and fit after their holiday"
"keeps fit with diet and exercise"
Source: WordNet® (An amazing lexical database of English)
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