Structure that covers or protects things. protect from something harmful.

relating to natural world and impact of human activity on its condition.

Easy to talk to or deal with.

The act of helping people learn. To help someone learn or do something.

To make clear or easy to understand by describing.

Being as one would expect; being usual or normal. naturally. person having innate talent.

having paid employment. action of doing work. To do your job in your company or workplace.

To indicate who or what someone or something is.

not same as another or each other.

self-confident, level-headed, or well organized. At the same time.

vowel prefixed to past tenses of verbs in Greek and certain other Indo-European languages. To make something larger, stronger, more effective.

make or become better.

Study of past events as an academic subject.

professional person. Highly qualified people, e.g. lawyers or doctors.

From one end or side of something to the other. From the beginning of something until the end. moving in one side and out of other side of.