teethe
/ti:ð; tið/ v[I]
(usu in the continuous tenses, or as a gerund or present participle 通常用於进行时态或用作动名词或现在分词) (of a baby) have its first teeth starting to grow through the gums （指幼儿）长牙, 出牙
Babies like to chew something when they're teething. 幼儿长牙时爱咬东西.