कमज़ोर (en. Weak)

Air pollution is concentrated mostly in thickly populated city regions, specially in developing countries, where the environmental regulations are weak, to such an extent that in the developing countries, level of pollution in the thickly populated regions is unhealthy.

I think Tom is weak.

The purslane smell is weak, the taste is weak, tart, refreshing.

An affected individual is generally thin with weak arms and legs.

For the same reason, backhand smashes tend to be weak.

India is not a weak country.

Hence, the market is weak.