sag >> saɡ
Definition: [verb] sink, subside, or bulge downwards under weight or pressure or through lack of strength.
Example: she let her head sag lower and lower
Definition: [verb] decline to a lower level, usually temporarily.
Example: exports are forging ahead while home sales sag
Definition: [noun] a downward curve or bulge in a structure caused by weakness or excessive weight or pressure.
Example: a sag in the middle necessitated a third set of wheels
Definition: [noun] a decline, especially a temporary one.