s'efforcer znamená v Angličtina

try [tried, trying, tries]▼◼◼◼(to work on something)
verb
[UK: ˈtraɪ] [US: ˈtraɪ]

strive▼◼◼◼(to sincerely try to achieve, to make one's best effort)
verb
[UK: straɪv] [US: ˈstraɪv]

struggle [struggled, struggling, struggles]▼◼◼◻(to strive, to labour in difficulty, to fight)
verb
[UK: ˈstrʌɡ.l̩] [US: ˈstrʌɡ.l̩]