(slang) A tough person. / (New Zealand, slang) An amusing, funny, witty, or possibly strange person. May be used as a term of endearment.

A type of pronunciation change required when speaking certain Celtic languages.

(of a living being) To die only after a desperate struggle for life. / (of a custom, idea etc) To be slow in changing or disappearing.

Alternative form of hardworking

(astronautics) An explosion in a rocket engine during startup, usually due to the presence of too much propellant prior to ignition.

A technical skill, not one that is interpersonal.

(live action role-playing games) As a roleplayer, of a skill that one's character has, to carry that skill out literally.

To connect components by means of permanent electrical wires. / (computing) To implement a feature in hardware rather than in software so that it cannot easily be changed.

(Internet) An automatic redirect.

plural of hard hat