'taru' adjective, adverb taking the と particle

  1. anguished, distressed, worried, discontented.

adverb taking the と particle, takes する

Colloquialism.
  1. horny.

Variations

Pronunciation Kanji Kana Is Common
悶々 もんもん
悶悶 もんもん

Contained Kanji Breakdown

be in agony, worry
モン もだ.える もだえ.る (Kentei Pre-1)
gate, counter for cannons
モン かど と (2nd, N2)
heart, mind, spirit
こころ シン (2nd, N4)
repeated kanji symbol