sinewy (adj.)

• able-bodied
• acid
• athletic
• biting
• brawny
• broad-shouldered
• burly
• cartilaginous
• chewy
• cohesive
• coriaceous
• corrosive
• cutting
• driving
• durable
• effective
• fibrous
• forceful
• forcible
• gristly
• gutsy
• hard
• hardy
• imperative
• impressive
• incisive
• lasting
• leatherlike
• leathery
• mighty
• mordant
• muscle-bound
• muscular
• nervous
• penetrating
• piercing
• poignant
• powerful
• resistant
• robust
• ropy
• sensational
• slashing
• stiff
• stout
• strapping
• striking
• stringy
• strong
• stubborn
• sturdy
• telling
• tenacious
• thickset
• tough
• trenchant
• untiring
• vigorous
• viscid
• vital
• well-knit
• well-set
• wiry