English-Thai Dictionary
ob-
PRF ด้าน ก่อน ใน ทาง dan
Webster's 1913 Dictionary
OB-
Ob-. Etym: [L. ob, prep. Cf. Epi-. ]
Defn: A prefix signifying to, toward, before, against, reversely, etc. ; also, as a simple intensive; as in oblige, to bind to; obstacle, something standing before; object, lit. , to throw against; obovate, reversely, ovate. Ob- is commonly assimilated before c, f,g, and p, to oc-, of-, og-, and op-.
New American Oxford Dictionary
ob-
ob- ▶prefix 1 denoting exposure or openness: obverse. • expressing meeting or facing: observe. 2 denoting opposition, hostility, or resistance: obstacle. • denoting hindrance, blocking, or concealment: obliterate | obviate. 3 denoting extensiveness, finality, or completeness: obdurate | obsolete. 4 (in modern technical words ) inversely; in a direction or manner contrary to the usual: obconical. ORIGIN from Latin ob ‘toward, 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 ( occasion ); of- before f ( offend ); op- before p ( oppress ).
Oxford Dictionary
ob-
ob- |ɒb | ▶prefix 1 denoting exposure or openness: obverse. • expressing meeting or facing: occasion. 2 denoting opposition, hostility, or resistance: opponent. • denoting hindrance, blocking, or concealment: obviate. 3 denoting 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.
The Wordsmith Dictionary