First-string and Hard-hearted

First-string adjective - Of the very best kind.

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

Hard-hearted adjective - Having or showing a lack of sympathy or tender feelings.

First-string and hard-hearted are semantically related. Sometimes you can use "First-string" instead an adjective phrase "Hard-hearted".