IPA: /ˈlaɪfˌɡɑːrdɪŋ/
KK: /ˈlaɪfˌɡɑrdɪŋ/
The job of watching over people at a beach or pool to keep them safe while they swim.
She enjoys lifeguarding during the summer at the local pool.
Lifeguarding → It is formed from "life" (from Old English "līf", meaning existence or living) and "guarding" (from Old French "guarder", meaning to keep safe or protect). The word "lifeguarding" refers to the act of protecting or ensuring the safety of individuals in a swimming area or aquatic environment.
Think of someone who is responsible for keeping people safe while they are enjoying their 'life' in the water — that's what lifeguarding means.