plural of hardy hole

A merchant that sells tools, fasteners, and similar objects known collectively as hardware, as well as related sundries used in construction and repair.

(metallurgy) To impart greater hardness to the surface of a piece of metal.

simple past tense and past participle of case harden

(metallurgy) Metal that is harder at its surface, due to a case hardening process.

Alternative spelling of case hardened / Hardened by experience.

(nautical) A large, hard biscuit made from unleavened flour and water; formerly used as a long-term staple food aboard ships.

(botany) Of a plant: requiring protection against frost.

(botany) A plant that requires protection against frost.

(nonstandard, or attributive) Alternative spelling of hard hat / (slang) A person who wears a hard hat, such as a construction worker.