Pronounced JAMAL (short first syllable; long, stressed second syllable).

This would express the "idea" of beauty, as you put it. It is not specific to the beauty of the human form or a human visage of a male or a female, but is used for beauty in general, applied to natural and man-made things, as well as to metaphysical beauty.

Again this is an abstract noun, so when used abstractly, you would add the definite article, the prefix "AL-", so the word would become الجمال pronounced AL-JAMAL. This time the L in "AL-" retains its phonetic value.

Other words that also express beauty in general include حسن pronounced HUSN.

Both HUSN and JAMAL are treated as masculine nouns.

There are other words for beauty that have narrower application, such as the words that are appropriate for the beauty of the human form.

Fuad