Resembling, characteristic of, or somewhat like a hag; haggish (rare or archaic variant).
From 'hag' plus the suffix '-ly,' an older way to form adjectives meaning 'resembling.' This suffix '-ly' differs from the adverbial '-ly' and is much less common in modern English.
English has two '-ly' suffixes that do completely different things: one makes adverbs (quickly) and one makes adjectives (friendly), and they both come from Old English but with separate histories.
Complete word intelligence in one call. Free tier — 50 lookups/day.