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A hold in which the opponent's shoulders and hips are pinned to the ground from the side.
Early 20th century. From Japanese yoko-shiho-gatame from yoko side + shihō the four quarters, all directions (from shi four + hō direction) + -gatame, combining form of katame (in wrestling) hold, nominalized stem of katameru, lit. ‘to make hard’ (ultimately from the base of katai hard).