A person with extensive knowledge or ability in a given subject.
expire
expire
verb
(intransitive) To come to an end; to conclude.
(intransitive) To lapse and become invalid.
(transitive) To bring to a close; to terminate.
(transitive) To give forth insensibly or gently, as a fluid or vapour; to emit in minute particles.
(transitive, intransitive) To exhale; to breathe out.
expiry
expiry
noun
(Britain, New Zealand, Australia, Canada) Death.
(Britain, New Zealand, Australia, Canada) End; termination; expiration.
(New Zealand, Australia) Synonym of expiration date
export
export
adj
Of or relating to exportation or exports.
noun
(countable) Something that is exported.
(uncountable) The act of exporting.
verb
(transitive) To carry away.
(transitive) To cause to spread in another part of the world.
(transitive) To put up (a child) for international adoption.
(transitive) To sell (goods) to a foreign country.
(transitive, computing) To send (data) from one program to another.
extirp
extirp
verb
(transitive, obsolete) To extirpate (something).
perdix
perfix
perfix
verb
(obsolete) To fix surely; to appoint.
permix
permix
verb
(obsolete) To mix; to mingle.
peroxy
peroxy
noun
(chemistry, in combination) The divalent radical -O-O- derived from a peroxide
plexor
plexor
noun
(medicine, now rare) A hammer (or other instrument) used to test a person's reflexes.
praxes
praxes
noun
plural of praxis
precox
precox
noun
Alternative form of praecox
prefix
prefix
noun
(computing) An initial segment of a string of characters.
(grammar, linguistic morphology) A morpheme added to the beginning of a word to modify its meaning, for example as, pre- in prefix, con- in conjure, re- in reheat, etc.
(telecommunications) A set of digits placed before a telephone number, to indicate where the number is based, what type of phone number it is (landline, mobile, toll-free, premium rate etc.)
A title added to a person's name, such as Mr. or Dr.
verb
(transitive) To determine beforehand; to set in advance.
(transitive) To put or fix before, or at the beginning of something; to place at the start.
premix
premix
noun
(Australia, informal) A manufactured beverage consisting of alcohol and soft drink, milk or other non-alcoholic drinks; an alcopop.
A blend of components that has been mixed in advance of use or of further processing.
verb
To blend in advance.
pretax
pretax
adj
Before the payment of taxes.
verb
To tax before the action being taxed occurs.
prexes
prexes
noun
plural of prex
prorex
prorex
noun
(obsolete) viceroy
riplex
torpex
torpex
Noun
A secondary explosive made from RDX, TNT and powdered aluminium, used in World War II.