虎こ視し眈たん々たん

adverb taking the 'to' particle, taru-adjective

vigilantly watching for an opportunity; with an eagle eye

Describes a state of watching intently and patiently, like a tiger eyeing its prey, waiting for the right moment to act. Often used with と and verbs like 狙う or 見守る.

• 彼かれは虎こ視し眈たん々たんと社しゃ長ちょうの座ざを狙ねらっている。

  He is vigilantly eyeing the president's position, waiting for his chance.

• ライバル企き業ぎょうが虎こ視し眈たん々たんと市し場じょう参さん入にゅうの機き会かいをうかがっている。

  Rival companies are eagerly watching for an opportunity to enter the market.