(idiomatic) One will not tell anyone else; one is keeping a secret.

If you eat well, you will be well; however, if you eat badly, you will feel bad.

Asks the age of the interlocutor. / (impolite) Used to question the mental age (maturity) of the interlocutor.

A place, usually on a limited-access highway, where one can stop to use the restroom or to take a break from travelling.

(idiomatic, colloquial, rhetorical question) Asked of somebody who was not present but was the topic of discussion.

(botany) a measure of leaf thickness, calculated by dividing the area of a portion of a leaf by the dry weight of that same portion of leaf.

Used other than figuratively or idiomatically: see area, influence.

(US, Australia, Philippines) A prefix appended to a telephone number indicating the geographical area.

Some tasks may be accomplished more easily by two (or more) people working together than by one working alone.

It is easy to get money from foolish people. / It is difficult or unlikely that foolish people maintain their hold on acquired wealth.