Noun

• S: (n) ascendant, ascendent (position or state of being dominant or in control) "that idea was in the ascendant"
• direct hypernym / inherited hypernym / sister term
• derivationally related form
• S: (n) ancestor, ascendant, ascendent, antecedent, root (someone from whom you are descended (but usually more remote than a grandparent))

Adjective

• S: (adj) ascendant, ascendent, ascensive (tending or directed upward) "rooted and ascendant strength like that of foliage"- John Ruskin
• S: (adj) ascendant, ascendent, dominating (most powerful or important or influential) "the economically ascendant class"; "D-day is considered the dominating event of the war in Europe"