名詞 teething:

1. the eruption through the gums of baby teeth
   同義詞：dentition, odontiasis

動詞 teethe:

1. grow teeth; cut the baby teeth
   同義詞：teethe

1. Babies like to chew something when they're teething.
   幼兒長牙時愛咬東西。
2. The baby is teething and has been irritable for several days.
   那個嬰孩在出牙齒，這幾天一直煩躁不安。