Hackneyed means worn out by being repeated far too often. A hackneyed phrase, hackneyed and dull, the hackneyed argument.
It is the standard word for a cliche and is itself close to being one. The hackney was a horse hired out to anybody, so a hackneyed thing has been used by everybody until nothing is left of it.
1adjectivehackneyedWorn out by being repeated far too often.
“The love song was full of hackneyed rhymes like heart and apart.”
hackneyed is a quality.
From hackney, a horse let out for hire, hence anything worn out by common use.
From hackney + -ed. Most likely from the fact that hackney carriages have been used so much, that they are extremely commonplace now.
Etymology from Wiktionary, CC BY-SA