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Kotomora

徹

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

JLPTN1StatusJōyō · secondary schoolFrequencyTop 1,000Strokes15

Readings

On'yomi

  • テツ

Kun'yomi

—

Nanori

  • あき
  • つ
  • てっ
  • とおる

Meaning

徹 centers on going all the way through something: penetrating, piercing, or striking home. It extends to doing something thoroughly, like sitting up all night, where you push through until the end.

Most common words using 徹

20 of 40
  • 徹底てってい
    N3

    thoroughness; completeness; consistency

  • 徹底的てっていてき
    N1

    thorough; exhaustive; complete

  • 徹夜てつや
    N3

    staying up all night

  • 徹するてっする
    N1

    to penetrate; to sink in

  • 冷徹れいてつ

    cool-headed; level-headed; hard-headed

  • 一徹いってつ

    obstinate; stubborn; inflexible

  • 貫徹かんてつ

    accomplishment; realization; attainment; fulfillment; achievement

  • 徹頭徹尾てっとうてつび

    thoroughly; through and through; out and out; in every way; from beginning to end; from start to finish

  • 不徹底ふてってい

    inconsistent; illogical; unconvincing; not thorough; indefinite; half-way

  • 透徹とうてつ

    transparency

  • 一徹短慮いってつたんりょ

    stubborn and short-tempered

  • 一徹者いってつもの

    stubborn person; diehard

  • 三徹さんてつ

    staying up all night three nights in a row; triple all-nighter

  • 二徹にてつ

    staying up all night two nights in a row; double all-nighter

  • 凡事徹底ぼんじてってい

    doing mundane things properly and thoroughly; thoroughness in all things; attention to detail

  • 初志貫徹しょしかんてつ

    carrying out one's original intention

  • 周知徹底しゅうちてってい

    making (something) known to everyone; publicizing as widely as possible; dissemination

  • 夜を徹するよをてっする

    to stay up all night; to sit up all night; to do something all night

  • 大悟徹底たいごてってい

    attain divine enlightenment; perceive absolute truth; experience spiritual awakening

  • 完徹かんてつ

    all-nighter; staying up all night

Explore all words using 徹 →

Study

Etymology

徹 combines 彳 (movement) with a phonetic component that historically relates to piercing or passing through. The exact origin of the right side is uncertain, but the character consistently expresses thorough penetration.

Meaning mnemonic

The left side 彳 suggests movement, and the right side looks like a tool breaking through layers. Imagine a drill moving forward and piercing through a wall until it comes out the other side.

Reading mnemonic

For テツ, picture a metal tets (鉄, てつ) rod penetrating a barrier: tets -> テツ, and the rod strikes home.