Definition of ob- in English:

ob-

prefix

  • 1Denoting exposure or openness: obverse
  • 1.1Expressing meeting or facing: occasion
  • 2Denoting opposition, hostility, or resistance: opponent
  • 2.1Denoting hindrance, blocking, or concealment: obviate
  • 3Denoting finality or completeness: obsolete
  • 4(In modern technical words) in a direction or manner contrary to the usual; inversely: obconical

Origin

from Latin ob 'towards, against, in the way of'.

Usage

Ob- occurs mainly in words of Latin origin; it is also found assimilated in the following forms: oc- before c; of- before f; op- before p.

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a small amount; a little