Synonyms for essential element

Then, tenderness is an essential element in the character of a friend.

Do we not know that the essential element of love is a belief in its own eternity?

Surely so lovely a landscape could not exist without that most essential element!

This exception, however, contains just the essential element of the whole.

Though an essential element, there is comparatively but little of it.

All "holy water," in that church, contains salt as an essential element.

It even began to be recognized as an essential element of the season.

The value of the soldier is the essential element of success.

A fourth essential element is that of stated and simultaneous transfers.

Here we have touched on the second essential element of language.