sentirsi bedeutet auf Englisch

feel [felt, felt, feeling, feels]▼verb
[UK: fiːl] [US: ˈfiːl]He began to feel ill. = Iniziò a sentirsi malato.

frown [frowned, frowning, frowns]▼(to have a frown on one's face)
verb
[UK: fraʊn] [US: ˈfraʊn]