Verb (1-dan, intransitive)
1. to be mentally slow; to be befuddled
Auxiliary verb (1-dan)
Usually written in kana
2. to become engrossed in; to become absorbed in
Verb (1-dan, intransitive)
3. to become frayed and dishevelled (of hair, grass, etc.); to be fluffy
occ. written as 蓬ける