Ashadha means invincible or unconquered, and Purva means earlier. This is the first of a pair. Purva Ashadha gives the early, forceful version of victory, and Uttara Ashadha gives the settled one that actually holds.
In Hindu mythology, Apas are the divine waters, honoured in the Rigveda as mothers who cleanse and sustain. Water here is not gentleness. It washes things clean, it keeps people alive, and given enough time it wears through stone.
The symbol is a winnowing basket, the flat fan used to toss grain so the husk blows away. That is a precise image for what this star does well: keeping what has value and letting the rest go. Confidence works the same way when it is honest.
Its shakti (the special power a nakshatra carries) is invigoration, the restoring of lustre to something that had gone dull. Purva Ashadha natives are the ones who walk into a discouraged room and get everybody moving again.
The Hindu month of Ashadha takes its name from this pair of nakshatras. Guru Purnima, when teachers are honoured, falls in it, as does the Rath Yatra. Purva Ashadha is known for persuasion, conviction and the ability to make other people believe something is possible.