Of or relating to an activity that is passive and monotonous.

synonym: vegetative.

Roget 365: rank, lush; vegetable, vegetal, vegetive^†.   

Roget 367: vegetable, vegetal, vegetive^†, vegitous^†; herbaceous, herbal; botanic^†; sylvan, silvan^†; arborary^†, arboreous^†, arborescent^†, arborical^†; woody, grassy; verdant, verdurous; floral, mossy; lignous^†, ligneous; wooden, leguminous; vosky^†, cespitose^†, turf-like, turfy; endogenous, exogenous.    ... show more