

Please rinse your mouth with water now.
[ˈpliz ˈrɪns jər ˈmaʊθ ˈwɪθ ˈwɔtər ˈnaʊ.]
Don't forget to rinse your mouth after brushing.
[ˈdoʊnt fərˈɡɛt tu ˈrɪns jər ˈmaʊθ ˈæftər ˈbrəʃɪŋ.]
I rinsed my mouth with salt water twice yesterday.
[ˈaɪ ˈrɪnst ˈmaɪ ˈmaʊθ ˈwɪθ ˈsɔlt ˈwɔtər ˈtwaɪs ˈjɛstərˌdeɪ.]
"rinse a mouth" is in the lesson "Verbs 16" (Level 28), along with 11 other useful words. LinDuo has 180 topic lessons like this one, 2,375 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.