浪 (Kanji for wavelike)

Onyomi

ROU

ROBOTS only surf on good water waves!

浪費(ろうひ)

waste ☆☆☆☆☆ NP
浪 (wavelike) + 費 (expenses) = 浪費 (waste)

a waste of time or energy; a financial loss

浪人(ろうにん)

masterless samurai ☆☆☆☆☆
浪 (wavelike) + 人 (person) = 浪人 (masterless samurai)

masterless samurai or misfit nerd obsessed with same - note the left kanji means 'wavelike', and a ronin is a kind of drifter.

	Meaning	Hint	Radical
波	wave	SKIN	皮
浪	wavelike	GOOD	良

The wave gets your SKIN wet faster,
but the ronin finds it's GOOD to not have a master.