STOMACHER stum’ ək ər (פְּתִיגִיל, H7345). The name given to that part of a woman’s dress which covered the pit of the stomach and the breast. It was highly ornamented and worn under the lacing of a bodice. The word was first used in this sense in Isaiah 3:24 by Coverdale and is found in the KJV of this text. The RSV has RICH ROBE. The meaning of the Heb. word is uncertain.
International Standard Bible Encyclopedia (1915)
stum’-uk-er: Used to translate pethighil (Isa 3:24 the ), where the meaning is uncertain. The English word denotes that part of a woman’s dress which covered the breast and the pit of the stomach. It was usually much ornamented.