STEP Hebrew Lexicon: סָרַח

1) to go free, be unrestrained, be overrun, exceed, overhang, grow luxuriously

1a) (Qal)

1a1) to go free, be unrestrained, sprawl

1a1a) overrunning, spreading (participle)

1a2) to overhang

1b) (Niphal) to be let loose or dismissed or gone