見詰める
みつめる · mitsumeru · JLPT N2 · verb-ichidan
to stare at
👀 見 = see + 詰める = pack tight: seeing with focus squeezed onto one point
詰める means to pack tight or close the gap. 見詰める is sight squeezed down to a single fixed target, so it means staring or gazing fixedly rather than glancing.