From gradual + -ly.

• IPA: /ˈɡɹæd͡ʒuəli/

gradually

1. In a gradual manner; making slow progress; slowly.
2. (obsolete) by degrees
   • 1682, Nehemiah Grew, The Anatomy of Plants. […], [London]: […] W. Rawlins, for the author, published 1682, →OCLC ↗:

     Horns, upon the due accession of Moisture, doth gradually become Soft.

• (making slow progress) ponderously, sluggishly; See also Thesaurus:slowly
• (by degrees) incrementally, step by step, See also Thesaurus:gradually

• French: progressivement
• German: nach und nach, allmählich, stufenweise, schrittweise
• Italian: gradualmente
• Portuguese: gradualmente, pouco a pouco
• Russian: постепе́нно
• Spanish: gradualmente, poco a poco, paulatinamente