потвърждавам означава в английски

attest [attested, attesting, attests]▼(to affirm to be correct, true, or genuine)
verb
[UK: ə.ˈtest] [US: ə.ˈtest]

avouch▼(To confirm or verify)
verb
[UK: ə.ˈvaʊtʃ] [US: ə.ˈvaʊtʃ]

certify [certified, certifying, certifies]▼(to attest as to)
verb
[UK: ˈsɜː.tɪ.faɪ] [US: ˈsɝː.tə.ˌfaɪ]

corroborate [corroborated, corroborating, corroborates]▼(To confirm or support with additional evidence)
verb
[UK: kə.ˈrɒ.bə.reɪt] [US: kə.ˈrɑː.bə.ˌret]

endorse [endorsed, endorsing, endorses]▼(support)
verb
[UK: ɪn.ˈdɔːs] [US: en.ˈdɔːrs]

reaffirm [reaffirmed, reaffirming, reaffirms]▼(affirm again)
verb
[UK: ˌriːə.ˈfɜːm] [US: ˌriə.ˈfɝːm]

substantiate [substantiated, substantiating, substantiates]▼(to authenticate or corroborate)
verb
[UK: səb.ˈstæn.ʃɪeɪt] [US: səb.ˈstæn.tʃi.ˌet]

sustain [sustained, sustaining, sustains]▼(to maintain something)
verb
[UK: sə.ˈsteɪn] [US: sə.ˈsteɪn]

verify [verified, verifying, verifies]▼(to confirm or test the truth or accuracy of something)
verb
[UK: ˈve.rɪ.faɪ] [US: ˈve.rə.ˌfaɪ]

vouch [vouched, vouching, vouches]▼(to back, confirm, or support (someone or something) with credible evidence or proof)
verb
[UK: vaʊtʃ] [US: ˈvaʊtʃ]

acknowledge [acknowledged, acknowledging, acknowledges]▼(to notify receipt)
verb
[UK: ək.ˈnɒ.lɪdʒ] [US: æk.ˈnɑː.lɪdʒ]

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