to sit astride a horse, bicycle, or other animal or vehicle; to span or straddle two sides of something

(bound form) used after a verb, adjective, or noun to represent the person or thing performing an action or possessing a quality; translates as "-er", "-ist", or "one who"

(bound form) apt to; prone to; used before a verb to show that something happens easily, as in being forgetful or emotional

to fall; to sink; (figuratively) to degenerate or fall into a bad state