off and on (adv.)
- alternately
- capriciously
- changeably
- eccentrically
- erratically
- fitfully
- haltingly
- intermittently
- irregularly
- jerkily
- patchily
- reciprocally
- roughly
- spasmodically
- sporadically
- uncertainly
- unevenly
- unpredictably
- unsteadily
- unsystematically
- variably
- waveringly
- whimsically
