vbl. sb. Also achevyng, achiving, atchieving. [f. ACHIEVE + -ING1.] A completing, accomplishing or successful performing. (Now mostly gerundial.)
1539. Taverner, Prouerbes (1552), 25. One daye or lytel tyme is not ynoughe for the acheuynge of a greate matter.
1625. Bacon, Ess., xxxix. (1862), 162. For the Atchieving of a desperate Conspiracie, a Man should not rest upon the Fiercenesse of any mans Nature.