fid- to trust; rely on

infidel s- agnostic a- religious

a person who doesn't accept a particular religion

confidante s- best friend a- stranger

a woman whom secrets are confided

affidavit s- oath a- lies

a written declaration upon oath made before an authorized official (therefore assumed to be true)

perfidy s- deceit a- reliable

deliberate breach of faith or trust; treachery

confident s- sure a- unsure

having strong belief/full assurance

diffident s- shy a- confident

lacking confidence/trust in one's ability worth; timid; shy

fiduciary s- trust a- doubt

people to whom property or power is entrusted for the benefit of another

fideism s- the great awakening a- the enlightenment

reliance on faith rather than reason in pursuit of religious truth

fidelity s- alliegence a- unreliable

strict observance of promises or duties; loyalty

confide s- trust a- mistrust

to impart secrets trustfully; have faith