鉄壁(てっぺき)

てっぺき
noun
iron wall; impregnable defense
descriptive
1. iron wall; impregnable defense; unbreakable barrier
Literally an iron wall; figuratively, a defense or barrier that is extremely strong and cannot be broken through. Used both literally and as a metaphor for unshakable defense.
鉄壁(てっぺき)の守(まも)りを誇(ほこ)るチームだ。
It's a team that boasts an ironclad defense.
相手(あいて)の鉄壁(てっぺき)のディフェンスを崩(くず)せなかった。
We couldn't break through the opponent's impregnable defense.
彼(かれ)は鉄壁(てっぺき)のアリバイを用意(ようい)していたため、警察(けいさつ)も手(て)が出(だ)せなかった。
He had prepared an airtight alibi, so even the police couldn't touch him.

Literally "iron wall," used figuratively to describe anything that is extremely secure and cannot be penetrated or overcome.

Common collocations

  • 鉄壁(てっぺき)の守(まも)り (ironclad defense)
  • 鉄壁(てっぺき)のディフェンス (impregnable defense)
  • 鉄壁(てっぺき)のアリバイ (airtight alibi)
  • 鉄壁(てっぺき)の布陣(ふじん) (impenetrable formation)

Very common in sports commentary, especially for teams with strong defensive records. Also used in detective fiction and thrillers for unbreakable alibis or security.

general
Added 2026.3.1 21:15 · Revised 2026.9.2 13:01
14500/14505_teppeki