f is the voiceless labiodental fricative and v is the voiced labiodental fricative.
Basically for roofs your vocal cords don't vibrate on the final f sound. For rooves your vocal cords vibrate on the final v sound.
f is the voiceless labiodental fricative and v is the voiced labiodental fricative.
Basically for roofs your vocal cords don't vibrate on the final f sound. For rooves your vocal cords vibrate on the final v sound.