desultory
definition
lacking a plan or purpose; random and disconnected
example
His desultory efforts to stay fit consisted of sporadic gym visits and a few short runs each month.
synonyms
disconnectedaimlessrandom
word origin — from Latin 'desultorius', meaning 'jumping, skipping, or jumping in and out', from 'desultor', meaning 'one who leaps down, one who leaps from one thing to another'