продлевать bedeutet auf Englisch

extend [extended, extending, extends]▼(to increase in extent)
verb
[UK: ɪk.ˈstend] [US: ɪk.ˈstend]

prolong [prolonged, prolonging, prolongs]▼(to extend in space or length)
verb
[UK: prə.ˈlɒŋ] [US: prə.ˈlɒŋ]

renew [renewed, renewing, renews]▼(to extend a period of loan)
verb
[UK: rɪ.ˈnjuː] [US: rə.ˈnuː]

perpetuate [perpetuated, perpetuating, perpetuates]▼(to prolong the existence of)
verb
[UK: pə.ˈpe.tʃʊeɪt] [US: pər.ˈpe.tʃə.ˌwet]