- 2Significato: laborioushard severe tough difficultexhausting burdensome fatiguing unendurable
- 3Significato: onerousoverpowering crushing excessive mercilesstaxing fatiguing intolerable tiring
- 4Significato: dulltedious monotonous boring fatiguinghumdrum wearisome tiresome
- 5Significato: burdensomefatiguing tiring laboriousstrenuous toilsome wearisome
- 6Significato: tiringoverpowering crushing excessive mercilesstaxing fatiguing onerous intolerable
- 7Significato: difficultarduous burdensome fatiguing tiresomewearisome onerous toilsome laborious
- 8Significato: propertydifficult arduous burdensome exhausting fatiguinglaborious onerous toilsome hard
- 9Significato: strenuousenergetic emphatic fatiguing intensevigourous Herculean overwhelming arduous