1. (sink) deeply (into mud, snow, etc.)
2. (thrust) deeply (into a soft object)
Adverb
Adjective (な)
Onomatopoeic
3. (involved) too deeply (in a matter, relationship, etc.)
Adjective (な)
Onomatopoeic
4. drenched; soaked; sodden
Archaic
Adverb
Onomatopoeic
5. extremely (drunk)