Definition of ultra- in English:

ultra-

Pronunciation: /ˈʌltrə/

prefix

1To an extreme degree; very: ultramicroscopic
Synonyms
Northern English right;
Scottish unco
British informal jolly, dead, ever so, well, fair
North American informal real, mighty, awful, plumb, powerful, way
South African informal lekker
informal , dated devilish, frightfully
archaic exceeding
2Beyond; on the other side of: ultramontane Often contrasted with cis-.

Origin

from Latin ultra 'beyond'.

Definition of ultra- in:

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Pronunciation: dɪˈmɒrəlʌɪz
verb
cause (someone) to lose confidence or hope