A wooden mallet used for pounding rice

to bang head against the wall; to strengthen a construction wall with red clay and sandstone

to be forced to grind grain as a punishment (old)

(adj.) describes someone who does something without directions; (phrasal verb) to do something without thinking thoroughly.

(n.) a clumsy person who goes about in a haphazard manner, bumping into people and things; someone who works blindly without a clear direction or plan, like a headless chicken

to husk rice with a mortar and pestle

Evaniidae; ensign wasps

to dive under water hitting walls, to describe someone is very determined, going through hurdles and hardships

blindly; unthinkingly; often used to describe someone doing something (or following a trend) without the relevant understanding or knowledge

blindly; unthinkingly; often used to describe someone doing something (or following a trend) without the relevant understanding or knowledge

to nod off; to drift off with the head nodding

to take a huge risk; literally: to dive and bump onto the wall

get involved; rush headlong into