徹

テツ

徹, 彳, 亻, 育, 亠, 厶, 月, 攵, 𠂉, 乂, 丿

彳

penetrate, clear, pierce, strike home, sit up (all night)

徹底(てってい): thoroughness; completeness; consistency
徹夜(てつや): all night; all-night vigil; sleepless night
徹する(てっする): to sink in; to penetrate; to devote oneself; to believe in; to go through; to do intently and exclusively