improving

That tends to improve someone or something (especially (dated) to educate or morally better a person).

• 1663, Robert Boyle, Some Considerations Touching the Usefulnesse of Experimental Naturall Philosophy, Oxford: Ric[hard] Davis, Essay 1, p. 2, […] that Diviner part of Man, the Soule, which alone is capable of wearing the Glorious Image of i

present participle and gerund of improveform-ofgerundparticiple