Adverb
Verb (する)
Onomatopoeic
Usually written in kana
1. slowly; tardily; dawdling; lingering; hesitantly
ここでぐずぐずできない。I can't dawdle here.
Adverb
Onomatopoeic
Usually written in kana
2. complaining; grumbling
いつまでぐずぐず言ってんだ。How long are you going to keep grumbling?
Adverb
Verb (する)
Onomatopoeic
Usually written in kana
3. unsettled (e.g. weather)
Adjective (な)
Onomatopoeic
Usually written in kana
4. loose; slackened