READING  テツ
MEANING  penetrate
JLPT level N1 (full info & stroke order)
 
Words/compounds
てつや
all night, all-night vigil, sleepless night
てっする
to sink in, to penetrate, to devote oneself, to believe in, to go through, to do intently and exclusively
かんてつ
all nighter, sleepless night
いってつ
obstinate, stubborn, inflexible
てってい
thoroughness, completeness, consistency
 
Example sentences
徹夜
仕事を間に合わすため彼は徹夜で働いた。
He worked all night so that he could get the job done in time.
 
彼女は病気の子供を徹夜で看病した。
She kept an all-night vigil over her sick child.
徹する
夜を徹するか否か。
To work all night, or not.
完徹
おかげでほぼ完徹だ。
Thanks to which I was up nearly all night.
一徹
頑固一徹のボスだと思っていたけれど、結構かわいいところもあるじゃない。
I thought our boss was stubborn as a mule but actually he has his cute side.
徹底
彼は徹底した利己主義者だ。
He is a thorough-going egoist.
 
Lookalikes
 
テツ 
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