Stiff means hard to bend. New leather shoes are stiff, a stiff collar stands up on its own, and a neck you slept badly on is stiff and sore every time you turn your head.
Bodies go stiff two ways: muscles after a long walk, joints in cold weather. A person can be stiff as well — polite but not relaxed, with a stiff smile and a stiff handshake. A stiff drink is a strong one, a stiff breeze is a hard one, and stiff competition is the kind that leaves you no easy way through. English also uses it as an adverb inside a small fixed set: bored stiff, scared stiff, frozen stiff. Watch the noun, though — a stiff is slang for a dead body, so 'he is a stiff' says something very different from 'he is stiff'.
1adjectivestiffHard to bend or move.
“The new hiking boots were stiff and rubbed his heels raw.”
2adjectiveachingAching and hard to move, of muscles or joints.
“I woke up stiff after eight hours in the car.”
3adjectiverelaxedFormal and not relaxed in manner.
“He gave a stiff nod and left the room.”
4adjectivesevereStrong, hard or severe.
“A stiff wind was blowing straight off the sea.”
5noundeadA dead body (slang).
“In the film the detective finds a stiff in the boot of the car.”
Too few real examples of this word to estimate which sense is commonest.
Also accepted in games: rigid
Stiff has been English the whole way down: Middle English stif, Old English stīf, then Proto-West Germanic and Proto-Germanic *stīfaz, back to Proto-Indo-European *steypós. The same root is visible across the sea in Dutch stijf, German steif and Norwegian stiv. Latin took the idea in another direction with stīpes, a stake or post, which is where English gets stevedore.
Proto-Indo-European
*steyp-
Middle English
stif
English, today
stiff
From Middle English stif. From Middle English stiff, stiffe, stif, from Old English stīf, from Proto-West Germanic stīf, from Proto-Germanic stīfaz, from Proto-Indo-European steypós. See also West Frisian stiif, Dutch stijf, Norwegian Bokmål stiv, German steif; also Latin stīpes, stīpō, from which English stevedore.
Etymology from Wiktionary, CC BY-SA