*hpʰu·-v-instrput self down into something yieldingalways with semelfactive -ci- or essive -ma-*dahpʰuy2pref.-vthrust hand into something soft while fallingfr. var.*dahpʰoy*dihpʰuy2pref.-vdrop self into something yielding (deep, soft feather bed)*mahpʰuy2pref.-vthrust foot into something yielding while falling