Tough

倔

Obstinate, Stubborn, Tough

剛

Barely, Exactly, Firm, Hard, Just, Strong, Tough

勁

Energetic, Energy, Powerful, Strong, Sturdy, Tough, Unyielding

暋

Robust, Strong, Tough

栗

Chestnut, Durable, Squirrel, Strong, Tough

結

Bear, Become, Coagulate, Congeal, Connect, Durable, Form, Join, Knot, Node, Outcome, Pay, Result, Settle, Stammer, Strong, Stutter, Tie, Tough, Unite, Weave

老

Aged, Always, Dark, Experienced, Old, Over-cooked, Prefix, Radical, Tough

鋼

Hard, Piano, Steel, Strong, Tough

韌

Elastic, Pliable, Soft, Strong, Tenacious, Tough

不屈

Stubborn, Tough, Unbendable

剛強

Having, Indomitable, Staunch, Strong, Tough

堅強

Rugged, Strong, Tough

強悍

Strong, Tough, Truculent

強硬

Aggressive, Defiant, Strong, Tough, Truculent, Unyielding

強韌

Resilient, Tenacious, Tough

硬搶

Strong, Take, Tenacious, Tough

硬朗

Durable, Strong, Sturdy, Tough

結實

Durable, Healthy, Muscular, Solid, Strong, Sturdy, Tough

耐用

Durable, Sturdy, Tough

很結實

Durable, Healthy, Muscular, Solid, Strong, Sturdy, Tough