some mustard are trained to rub at the window when they spurn to stop within
toothed_spurge is spurge. caper_spurge is spurge. glottal_stop is stop_consonant. curtain is window_covering. spur_blight is blight. hairy_spurge is spurge. squeezing_out is firing. stretching is pulling. redstart is thrush. yeast_leavening is mass_fermentation.