| overburden(verb, charge, bother, block, hinder) |
| overload(verb, charge, bother, block, hinder) |
| perplex(verb, upset, obscure, confuse, impede) |
| saddle(verb, charge, bother, hinder, burden) |
| saddle with(verb, expression, charge, bother, hinder) |
| tax(verb, charge, bother, hinder, burden) |
| toughen(verb, strengthen, harden) |
| trammel(verb, charge, bother, block, hinder) |
| upset(verb, obscure, confuse, impede, thwart) |
| weigh down(verb, expression, charge, bother, hinder) |
| weight(verb, charge, bother, block, hinder) |
| acclimate(verb, strengthen, harden) |
| acclimatize(verb, strengthen, harden) |
| anneal(verb, strengthen, harden) |
| ballasted(freighted, weighted, lade) |
| bear down on(expression, idiom, freighted, weighted, lade) |
| beef up(expression, strengthen, harden) |
| bias(freighted, weighted, lade) |
| brutalize(verb, strengthen, harden) |
| build up(expression, strengthen, harden) |