Godan verb with 'su' endingintransitive verb tumbarse boca abajo

Godan verb with 'su' endingintransitive verb to lie face down (e.g. on the ground, napping on a desk);to lie prone

Godan verb with 'su' endingintransitive verb archaic to lower (one's head, gaze, etc.)

su verb - precursor to the modern suru archaic to lower (one's head, gaze, etc.)