犯嘀咕

1. • to hesitate
2. • to have second thoughts
3. • to be concerned
4. • to brood (over sth)
5. • to complain

Character by character

• 犯(fàn)violate
• 嘀(dí)sound of dripping water, a ticking clock etc
• 咕(gu)for the sound of a bird, an empty stomach etc