| enervative(adjective, dull, boring, tired, tedious) |
| exacting(adjective, dull, boring, tired, tedious) |
| exasperating(adjective, dull, boring, tired, tedious) |
| exhausting(adjective, dull, boring, tedious, dreary) |
| fagging |
| fatiguing(adjective, dull, boring, tedious, dreary) |
| flat(adjective, dull, stupid, boring, tedious) |
| grinding |
| grubbing |
| hard(adjective, dull, boring, tired, tedious) |
| hardworking |
| heavy(adjective, dull, boring, tired, tedious) |
| hefty(adjective, dull, boring, tired, tedious) |
| ho-hum(adjective, dull, boring, tedious, dreary) |
| humdrum(adjective, dull, stupid, boring, tedious) |
| interminable(adjective, dull, flat, stupid, dead) |
| irritating(adjective, dull, boring, tired, tedious) |
| laborious(adjective, dull, boring, tedious, dreary) |
| lifeless(adjective, dull, flat, stupid, dry) |
| moiling |