| ARDUOUS | • arduous adj. Needing or using up much energy; testing powers of endurance. • arduous adj. (Obsolete) burning; ardent. • arduous adj. Difficult or exhausting to traverse. |
| VIDUOUS | • VIDUOUS adj. widowed; empty. |
| ARDUOUSLY | • arduously adv. In an arduous manner. • ARDUOUS adv. laborious. |
| ASSIDUOUS | • assiduous adj. Hard-working, diligent or regular (in attendance or work); industrious. • ASSIDUOUS adj. diligent; persistent. |
| DECIDUOUS | • deciduous adj. (Biology, anatomy) Describing a part that falls off, or is shed, at a particular time or stage of development. • deciduous adj. (Botany) Of or pertaining to trees which lose their leaves in winter or the dry season. • deciduous adj. Transitory, ephemeral, not lasting. |
| DIVIDUOUS | • dividuous adj. Divided; dividual. • DIVIDUOUS adj. divided; special. |
| RESIDUOUS | • residuous adj. (Archaic) Remaining; residual. • RESIDUOUS adj. remaining, also RESIDUAL. |
| ARDUOUSNESS | • arduousness n. The state of being arduous. • ARDUOUSNESS n. the state of being arduous. |
| ASSIDUOUSLY | • assiduously adv. In an assiduous manner; diligently, industriously. • ASSIDUOUS adv. diligent; persistent. |
| DECIDUOUSLY | • deciduously adv. In a deciduous manner. • DECIDUOUS adv. losing leaves in autumn. |
| INDECIDUOUS | • indeciduous adj. Not deciduous; evergreen; permanent; perennial. • INDECIDUOUS adj. not deciduous. |
| ARDUOUSNESSES | • arduousnesses n. Plural of arduousness. • ARDUOUSNESS n. the state of being arduous. |
| ASSIDUOUSNESS | • assiduousness n. The state or property of being assiduous. • ASSIDUOUSNESS n. the state of being assiduous. |
| DECIDUOUSNESS | • deciduousness n. The state or condition of being deciduous; the quality of trees which lose their leaves in winter or the dry season. • DECIDUOUSNESS n. the state of being deciduous. |
| ASSIDUOUSNESSES | • ASSIDUOUSNESS n. the state of being assiduous. |
| DECIDUOUSNESSES | • DECIDUOUSNESS n. the state of being deciduous. |