I
staunch adjective BrE AmE stɔːn t ʃ stɑːn t ʃ —in Received Pronunciation formerly also stɑːn t ʃ
▷ stauncher ˈstɔːn t ʃ ə AmE - ə r ˈstɑːn t ʃ-
▷ staunchest ˈstɔːn t ʃ ɪst -əst ˈstɑːn t ʃ-
II
staunch verb BrE AmE stɔːntʃ stɑːn t ʃ, § stæn t ʃ
▷ staunched stɔːntʃt stɑːn t ʃt, § stæn t ʃt
▷ staunches ˈstɔːntʃ ɪz ˈstɑːn t ʃ-, § ˈstæn t ʃ-, -əz
▷ staunching ˈstɔːntʃ ɪŋ ˈstɑːn t ʃ-, § \ ˈstæn t ʃ-