Tough

tuf, adj. not easily broken: firm: stiff, viscous, sticky: stubborn, hard to manage, trying: violent: tenacious: able to endure hardship.— n. a rough, a bully.— v.t. or v.i. Tough′en , to make or become tough.— adj. Tough′ish , rather tough.— adv. Tough′ly .— n. Tough′ne . [A.S. tóh ; cog. with Ger. zähe .]