Partly

Words referring to a complete degree: when something is done, happens, is thought, is felt, etc completely and in every way.

• What words indicate that something is done partly?
  partly partially to some extent to a certain extent to a degree to some degree up to a point in part sort of
• What words indicate that something is done one part at a time?
  gradually in stages step by step one step at a time in increments incrementally piecemeal by degrees little by little