covered with or affected by rust.

consisting of or produced by rust.

of or tending toward the color rust; rust-colored.

faded or shabby; impaired by time or wear, as clothes or drapery.

impaired through disuse or neglect

My Latin is rusty.

having lost agility or alertness; out of practice

I am a bit rusty at tennis.

(of a sound) grating or harsh.

adjective

experienced , practiced , talented

adjective

decayed , oxidized , rust-covered , rusted , deficient , impaired , neglected , not what it was , sluggish , soft , stale , unpracticed , unqualified , weak , corroded , discolored , eroded , ferruginous , fusty , mildewed , musty , rancid , reasty , rough , rubiginous , rugged , seruginous , stained , unused