tvrdiť znamená v Angličtina

assert [asserted, asserting, asserts]▼(to affirm)
verb
[UK: ə.ˈsɜːt] [US: ə.ˈsɝːt]

confirm [confirmed, confirming, confirms]▼(to assure)
verb
[UK: kən.ˈfɜːm] [US: kən.ˈfɝːm]