to be wet (with tears); to be moist
to get dim; to become blurred; to get cloudy; to get muddy; to be bleared
to become tear-choked
彼女の目は涙で潤んだ。
Her eyes grew wet with tears.
昔の写真を見るたびに自然と目が潤む。
Every time I look at old photos my eyes naturally well up.
感動のあまり彼の声はすっかり潤んでいた。
Overcome with emotion, his voice was thoroughly choked up.