means Soft enough to be smeared evenly across a surface like bread or a cracker, usually with a knife.

from From "spread," which descends from Old English "sprǣdan," to stretch out or extend over a surface — a cousin of Dutch "spreiden" and German "spreiten." The "-able" suffix, borrowed through French from the Latin "-abilis," simply means "capable of being done," so "spreadable" is literally "able to be stretched out flat" — a word that earned its modern fame in the age of mass-produced butters and margarines competing to prove they wouldn't tear your toast.