Amnesia induced by mental trauma or other frightening events is called:

Amnesia induced by mental trauma or frightening events is called suppression, often termed repression, where distressing memories are kept out of conscious recall.

Proactive initiative is not a memory term and does not describe trauma-induced forgetting.

Retroactive initiative is likewise not a recognised memory concept here.

Condensation is a dream mechanism in psychoanalysis where several ideas fuse into one image, not amnesia.

Repression, in Freud's theory, is a defence mechanism that blocks threatening material from awareness.

Unlike organic amnesia from brain damage, this is a psychogenic or functional memory loss.