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Preparation : act of preparing

Preponderant : superiority of power or quality

Relevance : quality of being relevant

Apparatus : appliances

Ignorance : blindness, in experience

Obsession: complex enthusiasm

precipitate : speed, active
corroborative: refutable
obnoxious : harmless
sanction: hinder
empirical: experimental
aborigine: emigrant
corpulent : emaciated
officious: pragmate