fid-, fidel-

1. The quality of being faithful; faithfulness, loyalty, unswerving allegiance to a person, party, bond, etc.
2. Strict conformity to truth or fact.
3. Faithfulness to a sexual partner, especially a husband or wife.
4. The degree to which a sound or picture reproduced or transmitted by any device resembles the original; especially, in high fidelity.

Faith and justice.

May faith grant light.

Motto of St. Gregory's College, Shawnee, Oklahoma, USA.

1. Of or pertaining to, or of the nature of, trust or reliance.
2. Relating to a legal trust; fiduciary.
3. Regarded or used as a standard of reference, as in surveying.

1. In trust of a person or thing; holding something in trust.
2. Of or pertaining to a trustee; pertaining to or of the nature of a trusteeship; held in trust.
3. Relating to or depending on confidence in a government for the value of fiat money (paper money decreed to be legal tender, not backed by gold or silver and not necessarily redeemable in coin).

In faith, justice, and strength.

Motto of the Order of St. George, Bavaria, Germany.

There is trust in faith.

Motto of Leys School, Cambridge, U.K.

1. Anyone who does not believe in what the speaker or writer holds to be the true religion; an unbeliever; applied especially to Christianity or Islam.
2. A disbeliever in religion or divine revelation generally; especially one in a Christian land who professedly rejects or denies the divine origin and authority of Christianity; a professed unbeliever.
3. In Muslim use: a person who does not accept the Islamic faith; kaffir. Heard more often in the news as spoken by Muslims and applied even to Christians.
4. A person who has no religious faith; an unbeliever.
5. Loosely, anyone who disbelieves or doubts a particular theory, belief, creed, etc.; a skeptic.

Unfaithfulness or disloyalty to a person, e.g. to a sovereign, lord, master, friend, lover; especially, in modern use, to a husband or wife, called more fully “conjugal infidelity”.

[Have] virtue in your faith but knowledge in your virtue.

Motto of Agnes Scott College, Decatur, Georgia, USA.

Freedom and loyalty.

Motto on the seal of the State of West Virginaia, USA.

Light and faith.

Motto of Taylor University, Upland, Indiana, USA.

1. In bad faith.
2. Acting in bad faith; pretended, not genuine, sham.

With or in bad faith.

One who has the least possible faith in something.