| gelling(verb, jellied, gel, calcify, coagulate) |
| gird(verb, close, set, firm, dry) |
| glob up(verb, expression, jellied, calcify, coagulate) |
| glop up(verb, expression, jellied, calcify, coagulate) |
| habituate(verb, dull, develop, blunt, accustom) |
| habituated(adjective, hard, unfeeling, unsympathetic, hardened) |
| hard-as-nails(adjective, hard, unfeeling, unsympathetic, hardened) |
| hard-bitten(adjective, hard, unfeeling, unsympathetic, hardened) |
| hard-boiled(adjective, hard, unfeeling, unsympathetic, hardened) |
| hard as nails(expression, adjective, idiom, callous, disciplined) |
| hardboiled(adjective, callous, disciplined, unexcitable, grooved) |
| harden(verb, close, set, firm, dry) |
| hardhearted(adjective, hard, unfeeling, unsympathetic, hardened) |
| heartless(adjective, hard, unfeeling, unsympathetic, hardened) |
| hitch on(verb, expression, jellied, calcify, coagulate) |
| hosing(jellied, gel, calcify) |
| immovable |
| impassible |
| impassive(adjective, hard, unfeeling, unsympathetic, hardened) |
| impenetrable(adjective, hard, unfeeling, unsympathetic, hardened) |