Synonyms of overtaxing

1 Syllable

hard, harsh

2 Syllables

heavy, grueling, pressing, painful, plodding, grave, taxing, serious, strenuous, grinding, arduous, galling, weighty, tiring, crushing

3 Syllables

laborious, demanding, rigorous, distressing, austere, toilsome, difficult, irksome, exhausting, severe, backbreaking, fatiguing, onerous, headache, merciless, ponderous, vexatious, exigent, exacting

4 Syllables

excessive, oppressive, burdensome, responsible, troublesome, cumbersome, formidable, tiresome, embittering

5 Syllables

intolerable, overpowering