fittest

In peak condition

Fittest is the superlative of fit—the most suitable, most healthy, or most capable.

Darwin's phrase survival of the fittest describes how organisms best adapted to their environment are most likely to reproduce.

In fitness contexts, it means in the best physical condition: She was the fittest athlete on the team.

elite

champion

Top competitor, or advocate

top · strongest · apex · premier · foremost · leading · dominant · unrivaled · supreme · outstanding

physical

athletic

Physically strong and active

stamina · agility · vigor · robustness · vitality · flexibility · training · toned · muscular · cardiovascular

evolution

adaptation

Fitting to new conditions

genotype · phenotype · variation · alleles · speciation · divergence · heritability · heredity · adaptive · offspring

survival

endurance

Sustained effort capacity

survivor · persistence · fortitude · toughness · viability · longevity · perseverance · durable · adaptable · resourceful

Opposites
physical fitness/health

fittestweakest

Least strong or capable

frailest · unhealthiest · sickliest · feeblest · puniest

Phrases
Family

fitted, outfitted, fitter, outfitter, fitters, outfitters, retrofitted

Familiarity
Top 50,000
Profile
Known to kids · Used worldwide · Timeless · Positive · Everyday, not technical · Rated G