use one thing for many purposes / work someone hard

to use one's head

a tree or shrub / wood, timber, lumber / (graph theory, computer science) a tree (data structure) / (theater, sumo, etc.) a clapper used to signal the opening or closing of a match or play

Combining form of 木 (き, ki): tree; wood

a tree / Short for 木曜日 (mokuyōbi): Thursday / wood grain

(derogatory) wooden, as of a person's character or behavior / (derogatory) wooden, as of a person's mental abilities: blockheaded, stupid, dimwitted

tree / wood

(historical) battleaxe, poleaxe

a reckless strike above one's strength or proper station / a brave individual who faces stronger enemies

Alternative form of 蟷螂の斧: a reckless strike above one's strength