Skeleton structure of a building or construction.

time during which something continues.

officially recognized or authorized. To state that meets certain standards.

Good result or effect, something advantageous. profit.

tool, utensil, or other piece of equipment. put (decision, plan, agreement, etc.) into effect.

To make certain something will happen or be done.

Tradition, custom or system accepted by a group.

sympathetically aware of other people's feelings. When you get the meaning correctly; comprehension. To know the meaning of language, what someone says.

single human being. Single people, looked at separately from others.

information and skills acquired through experience and education.

(of shooting) carried out to protect exposed person from enemy. thing used to protect, decorate, or conceal something else. To have sufficient funds to pay for something.

Set of changes that occur slowly and naturally. perform mechanical or chemical operations on.

continuing or valid to final destination. expressing movement into one side and out of other side of opening etc.. moving in one side and out of other side of.

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

action or process of providing someone or something with official document attesting to status or level of achievement. Official or legal permission to do something.