- leaden, plodding - (of movement) slow and laborious; "leaden steps"
Antonym: effortless (indirect, via effortful)
- drudgery, plodding, grind, donkeywork - hard monotonous routine work
--1 is a kind of labor, labour, toil
- plodding - the act of walking with a slow heavy gait
--2 is a kind of walk, walking
Derived form: verb plod1