adjective · (literary) being fully awake, conscious, or alert

经过一番救治，昏迷多日的病人神志逐渐惺忪。

adjective · having eyes half-closed or heavy with sleep after just waking up

他睡眼惺忪地从床上爬起来，还没完全清醒。

adjective · (literary) characterized by indecision, hesitation, or uncertainty

见此变故，他心中不免有些惺忪，拿不定主意。