励
レイ, はげ.む, はげ.ます

encourage, be diligent, inspire

JLPT1 G7 S7 F1254

厲# (vigorous exertion) + 力 power/energy → *urge* others to *exert* themselves/*work hard* → *apply oneself to*; *be diligent* → *encourage*; *cheer up*; *raise the voice*; *incentive*; *stimulation*.

[Full Kanji Etymology List]