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Vocabulary Latin Prefixes p. 197 Ob-
'against', 'in the way', 'over'
erase; blot out; destroy; remove all traces
trouble the mind of; haunt;preoccupy
something standing in the way; hindrance; obstruction; impediment
be in the way of; hinder; impede;block
thrust forward without being asked; intrude; impose
meet & dispose of; make unnecessary; avert