mature

He's fully mature, about seven years old.

This states that in two people who are adequately mature, who have what it takes to function emotionally, who are feasible propositions, love will overall, taken with perspective be simple.

This is some of what we might think and feel if we ever became those paragons of true intelligence: emotionally mature people.

So can we get a material that protects the tree for years on end, but when that tree is mature will then disintegrate and become biodegradable.