simple past tense and past participle of disaffect

Alienated or estranged, often with hostile effect; rebellious, resentful; disloyal. / (obsolete) Affected with disease.

Having a condition that impedes learning,

(South Africa, euphemistic) Belonging or relating to the previously disenfranchised population groups in South Africa, i.e. blacks, coloureds, and Indians.

Not advantageous.

Discontent; unrest. / Alienation; loss of loyalty.

(transitive) To cause a loss of affection, sympathy or loyalty in; to alienate or estrange.

To cease to have an affiliation (with); to take steps to break an affiliation or association.

simple past tense and past participle of disadvantage

Lacking an advantage relative to another. / (euphemistic) Poor; in financial difficulties.