abode n.

Middle English abiden, from Old English abidan, gebidan "remain, wait, wait for, delay, remain behind," from ge- completive prefix (denoting onward motion; see a- (1)) + bidan "bide, remain, wait, dwell" (see bide).

Originally intransitive (with genitive of the object: we abidon his "we waited for him"); the transitive senses of "endure, sustain, stay firm under," also "tolerate, bear, put up with" (now usually with a negative) are from c. 1200. To abide with "stay with (someone); live with; remain in the service of" is from c. 1300. 

Related: Abided; abiding. The historical conjugation was abide, abode, abidden, but in Modern English the formation generally is weak.

Proto-Indo-European root meaning "to trust, confide, persuade."

It forms all or part of: abide; abode; affiance; affidavit; auto-da-fe; bide; bona fide; confederate; confidant; confide; confidence; confident; defiance; defy; diffidence; diffident; faith; fealty; federal; federate; federation; fiancee; fideism; fidelity; fiducial; fiduciary; infidel; infidelity; nullifidian; perfidy; solifidian.

It is the hypothetical source of/evidence for its existence is provided by: Greek pistis "faith, confidence, honesty;" Latin fides "trust, faith, confidence, reliance, credence, belief;" Albanian be "oath," bindem "to be convinced, believe;" Old Church Slavonic beda "distress, necessity," bediti "to force, persuade;" Old English biddan "to ask, beg, pray," German bitten "to ask."