I did a lot of my growing up on a farm in rural Indiana and became used to this kind of unimpeded access to the past.
Since that break he had been progressing, markedly but unimpeded, toward larger and more horrendous acts of violence.
1760, from un- (1) "not" + past participle of impede.
c.1600, back-formation from impediment, or else from Latin impedire "impede, be in the way, hinder, detain," literally "to shackle the feet" (see impediment). Related: Impeded; impedes; impeding.