Ascendant (adjective)

1. Rising; ascending.
2. Having increasing power or influence; dominant.

Origin:

From the latin word "ascendere" meaning to climb, rise or ascend.

Examples:

1. The company's stock was in an ascendant trend, with prices steadily increasing.
2. He had an ascendant position in the company, with his ideas and strategies being implemented.
3. The country's economy was in an ascendant phase, with GDP growing rapidly.
4. The new regime was in an ascendant phase and quickly consolidated its power.
5. The politician's star was in the ascendant, and she was widely expected to win the election.