First-string and Primaeval

First-string adjective - Of the very best kind.

Primaeval and first-string are semantically related. In some cases you can use "Primaeval" instead an adjective phrase "First-string".

Primaeval adjective - Having existed from the beginning; in an earliest or original stage or state.

First-string and primaeval are semantically related. Sometimes you can use "First-string" instead an adjective "Primaeval".