"Femeile au părut mai slabe."

Translation: The women looked weaker.

[ximi.io]

Seemed should be an acceptable alternative to looked here as well

[AmadeusMinu]

The women seemed slimmer.

[LenaAnesia]

And thinner as an alternative to weaker

[axel_3021]

That was exactly what I was thinking... Seemed should also be an acceptable alternative.

[Coriander18]

Why not skinny, it was accepted in my last question

[PolyglotyrixRex]

For this use, "slabe" could be weak or skinny. "Subţire" would only be used for skinny.