勵
レイ, はげ.む, はげ.ます

strive, encourage

JLPT0 G13 S0 F5000

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]