| freely(unasked, unbidden) |
| freewilled(adjective, free, available, volunteered) |
| frivolous(adjective, wild, heedless, pointless, inconstant) |
| fruitless |
| futile(adjective, useless, unnecessary) |
| gawky(adjective, rough, coarse, clumsy, uncultivated) |
| graceless(adjective, rough, coarse, clumsy, uncultivated) |
| gratis(adjective, free) |
| gratuitous(adjective, senseless, unwarranted, wanton, unjustified) |
| grievous(adjective, dishonest, immoral, prejudiced, wrongful) |
| grim(adjective, mean, severe, harsh, heartless) |
| gross(adjective, rough, coarse, clumsy, uncultivated) |
| groundless(adjective, senseless, unwarranted, wanton, gratuitous) |
| hard(adjective, mean, severe, harsh, heartless) |
| hardhearted(adjective, mean, severe, harsh, heartless) |
| harsh(adjective, mean, severe, heartless) |
| hatchet job(expression, adjective, mean, severe, harsh) |
| having a killer instinct(expression, adjective, idiom, mean, severe) |
| heartless(adjective, mean, severe, harsh) |
| heavy-handed(adjective, rough, coarse, clumsy, uncultivated) |