Or muwtsaq {moo-tsawk'}; from yatsaq; narrowness; figuratively, distress -- anguish, is straitened, straitness.
see HEBREW yatsaq
H4164. mutsaq
II. מוּצָק מוּצָק, noun [masculine] constraint, distress; — absolute מוּצָק Isaiah 8:23 distress; absolute also מוּצָק Job 36:16, of distress as constraint (opposed to רַחַב); בְּמוּצָ֑ק מַיִם רֹחַב 37:10, literally in constraint (i.e. frozen). — 1. מוּצָק see יצק.