Answer: slithered

AnswerCrossword Clue
SLITHEREDMoved like a snake.
SLITHEREDWent stealthily
SLITHEREDEmulated a snake
slitheredSLITHER, to slide from side to side
slitheredMove smoothly over a surface with a twisting or oscillating motion
slitheredSlide or slip unsteadily on a loose or slippery surface