stick at
• persevere with a task or endeavour in a determined way.
• "I'm the type to stick at something even if it gets on top of me"
Similar:
persevere with,
persist with,
keep at,
work at,
continue with,
carry on with,
go on with,
not give up with,
hammer away at,
stay with,
see/follow through,
go the distance,
stay the course,
soldier on with,
stick it out,
hang in there,
put one's back into,
Opposite:
give up,