研究
けんきゅう · kenkyuu · JLPT N4 · noun
survey
🔬📚 研究 = polish/grind (研) + reach the extreme (究): grind a topic to its end
研 means to grind or sharpen, as in whetting a blade; 究 means to pursue something to its limit. Research is grinding away at a question until you reach the bottom of it. Sound hook: kenkyuu ≈ Ken queue — Ken queues at the lab.