chastely

siveästi In a chaste manner. (either specifically virginal, or in a modest, unsexy and unrisque manner)
1808 Allan Ramsay - The gentle shepher

Let lasses of a silly mind / Refuse what maist they're wanting / Since we for yielding were designed / We chastely should be granting.

In holy orders no one is better loved than he who lives chastely, because chastity is the first principle for any cleric as well as the foundation of his life.