The opposite of "push hard" would be "pull gently."
The opposite of rock-hard would be soft or flexible.
The opposite of hard-working could be lazy, slothful, lethargic, or indolent.
Soft
If you mean hard as in the opposite of soft, then rigid, firm, adamatine. If you mean the opposite of easy, then difficult
Soft means yielding readily to touch or pressure, easily penetrated or changed in shape. The opposite would be hard, solid and firm to the touch.
Hard
hard
hard
The opposite of "hard to get" would be "easy to get." This means that something is readily available, accessible, or straightforward to obtain or achieve.
The usual opposite of facil (easy) is dificil(difficult, hard).
the Hebrew word for complicated or hard (the opposite of easy) would be: kahshe and hard (the opposite of smooth) would be the same.