expression
with a half-opened eye; with one eye half open
Describes looking at something with one eye partially closed, often implying a scrutinizing, skeptical, or drowsy expression. Commonly used with verbs like 見る or 睨む.
彼は半眼で私をじっと見つめた。
He stared at me with one eye half open.
猫が半眼でこちらを睨んでいる。
The cat is glaring this way with a half-opened eye.