もつれる

also 縺れる

1. ichidan verb, intransitive, usually in kana to tangle; to get tangled; to get entangled
2. usually in kana, as 舌が〜, 足が〜, etc. to have poor control over (one's tongue, feet, etc.); to trip over
3. usually in kana to become complicated; to become difficult; to become tricky; to get into a tangle; to become messy