persistently (adv.)
- assiduously
- chronically
- decidedly
- decisively
- determinedly
- devotedly
- diligently
- doggedly
- earnestly
- enduringly
- faithfully
- firmly
- fixedly
- frequently
- habitually
- indefatigably
- industriously
- inflexibly
- insistently
- interminably
- long
- loyally
- obstinately
- patiently
- perseveringly
- pertinaciously
- ploddingly
- protractedly
- purposefully
- regularly
- relentlessly
- repetitively
- resolutely
- routinely
- sedulously
- seriously
- sincerely
- staunchly
- steadfastly
- steadily
- tenaciously
- tirelessly
- unendingly
- unfalteringly
- uninterruptedly
- unrelentingly
- unswervingly
- unwaveringly
- wholeheartedly
