through and through

not-comparable

Completely; entirely; fundamentally.

Japanese Meaning

完全に / 全く / 徹底的に / 根本的に

Despite his polished manners, he's a selfish person through and through.

洗練された礼儀作法をしていても、彼は徹頭徹尾利己的な人間だ。

Sense（1）

Completely; entirely; fundamentally.

He moved from Cincinnati to San Francisco, but he's still a Cincinnati Bengals fan, through and through.