to extinguish /ɪkˈstɪŋɡwɪʃ/ /ɪkˈstɪŋɡwɪʃ/
to quench /kwɛnʧ/ /kwentʃ/
to turn off /tɜrn ɔf/ /tɜːn ɒf/
to switch off /swɪʧ ɔf/ /swɪʧ ɒf/
to muffle /ˈmʌfl/ /ˈmʌfl/
to silence /ˈsɑɪ.ləns/ /ˈsaɪləns/