IPA: /ˈtiːðɪŋ/
KK: /ˈtiːðɪŋ/
The process when a baby's teeth start to come through the gums, often causing discomfort and fussiness.
Many parents find that their babies become more irritable during teething.
Teething is formed from "teeth" (from Old English "tīþ", meaning the hard structures in the mouth used for biting and chewing) and the suffix "-ing" (indicating the action or process of). The word "teething" refers to the process of teeth emerging through the gums.
Think of the hard structures in your mouth ('teeth') and the action of them coming through ('-ing') — that's what teething means.