Environmentalists doubt the 'adequacy' of the regulations. [=doubt that the regulations are adequate]
The school lunch should be 'adequate' to meet the nutritional needs of growing children.
Be sure to allow 'adequate' [='sufficient, enough'] time for the paint to dry.
(..) So, what do we do now, inspector? We do what we should have been doing. We find him. , Chancellor, we do not have the adequate force... I'll get it. - Eric Finch? - Yeah. Bloody hell. How many went out? (..)2005 V for Vendetta