Adverb
Adjective (な)
Adjective (の)
Onomatopoeic
Usually written in kana
1.  thick;  viscous;  mushy;  pulpy;  slushy;  syrupy;  sticky
Adjective (な)
Adjective (の)
Onomatopoeic
Usually written in kana
2.  muddy;  dirty (with oil, grease, etc.)
Adverb
Verb (する)
Onomatopoeic
Usually written in kana
3.  to be in an ugly state (of emotions, relations, etc.);  to be murky;  to be sordid