I think it would be special type. Sorry if its wrong!
Seldom as an adverb means rarely and not often.
Example: I seldom eat chocolate, because it often gives me stomachaches.
Answer:
adoring, calm, celebratory, modest, lively, confident ,contested, placid, passionate, optimistic, reverent, proud, delighted, effusive, elated, romantic, empathetic, appreciative, consoling, amiable, compassionate, cheery, complimentary, pleasant, earnest, benevolent
Explanation:
