| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | difficult, rigorous |
| Synonyms: | arduous, demanding, exacting, formidable, hairy*, hard, harsh, heavy sledding, heavy*, knotty, laborious, large order, mean, murder*, no picnic, operose, rough, stern, strenuous, taxing, tough, trying, uncompromising, uphill |
| Antonyms: | easy, facile |