μόχθος (móchthosmokh'-thosnountoil; labor)
[Grk] μόχθος LN: 42.48 GK: G3677 Hebrew: אָוֶן, יָגֹון, יְגִיעַ, עָמָל, פְּעֻלָּה, פֶּרֶךְ, תְּלָאָה
Derivation: from the base of μόγις;
Strong's: toil, i.e. (by implication) sadness
KJV: --painfulness, travail.
See: μόγις