teething

名词 teething:

1. the eruption through the gums of baby teeth
   同义词：dentition, odontiasis

动词 teethe:

1. grow teeth; cut the baby teeth
   同义词：teethe

1. Babies like to chew something when they're teething.
   幼儿长牙时爱咬东西。
2. The baby is teething and has been irritable for several days.
   那个婴孩在出牙齿，这几天一直烦躁不安。