| fission |
| flag(decline, weaken, degenerate, deteriorate, decay) |
| foil(hurt, ruin, challenge, weaken, frustrate) |
| fray(verb, decline, diminish, use, weary) |
| freeze the blood(expression, idiom, pain) |
| fritter away(verb, expression, blow, consume, lose) |
| frivol away(verb, expression, blow, consume, exhaust) |
| frustrate(hurt, ruin, challenge, weaken, blunt) |
| gamble away(verb, expression, blow, consume, exhaust) |
| gnawing |
| go downhill(verb, expression, decline, reduce, fail) |
| go off(verb, expression, decay, decompose, putrefy) |
| go to pieces(expression, idiom, decline, degenerate, deteriorate) |
| go to pot(expression, idiom, decline, weaken, degenerate) |
| go to waste(verb, expression, idiom, blow, consume) |
| gradually destroy |
| grave(verb, reduce, consume, scratch, carve) |
| graze(verb, decline, hurt, damage, diminish) |
| grind(verb, decline, diminish, use, weary) |
| grind down |