tread (subs.) Copy link • tread (subs.): ingressus, gressus, grădus, vestīgium, pes: v. step, footstep. To tremble at the t. (of persons walking over), ad ingressus tremere, Plin. 2, 94, 96: with impartial t., aequo pede, Hor. Od. 1, 4, 13. Also expr. by verb: v. to tread.