husbandly comes from husband + -ly. Husband is from Old English husbonda ('master of a household'), from Old Norse husbondi, from hus ('house') + bondi ('dweller, freeholder'), from bua ('to dwell'). Morphologically, the ending is part of the etymology: the suffix is attached to the older base named in the history, producing a later English derivative. In present English, the adjective sense is "of or befitting a husband; marital", so the historical development ends in a clearly identifiable modern dictionary use. The same base also appears in related forms such as husband, husbandry, and husbandman. Its semantic neighborhood includes marital, conjugal, and spousal, which helps locate the modern sense without adding a separate etymological claim. The named historical forms include Old Norse husbondi and Old English hus.