S: (v) lounge (sit or recline comfortably) "He was lounging on the sofa"
S: (v) sprawl (sit or lie with one's limbs spread out)
S: (v) perch, roost, rest (sit, as on a branch) "The birds perched high in the tree"
S: (v) squat, crouch, scrunch, scrunch up, hunker, hunker down (sit on one's heels) "In some cultures, the women give birth while squatting"; "The children hunkered down to protect themselves from the sandstorm"