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词汇 ir-
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ir- 1
pref.（前缀）
  1. Variant of in- 1
    in-的变体1
ir- 2
pref.（前缀）
  1. Variant of in- 2
    in-的变体2

ir-

prefix

a variant of in-1, in-2

in-1 or il- or im- or ir-

prefix

not; non-
⇒ incredible
⇒ insincere
⇒ illegal
⇒ imperfect
⇒ irregular
Compare un-1

Origin

from Latin in-; related to ne-, nōn not

in-2 or il- or im- or ir-

prefix

in; into; towards; within; on
⇒ infiltrate
⇒ immigrate
having an intensive or causative function
⇒ inflame
⇒ imperil

Origin

from in (prep, adv)

ir-1

1
variant of in-2. (by assimilation) before r: irradiate.

ir-2

1
variant of in-3. (by assimilation) before r: irreducible.
ir-I.
variant of in-2, before r, as in irradiate.
II.
variant of in-3, before r, as in irreducible.
ir-
⇨ see in-
ir-
/ɪr/  
prefix
variant spelling of IN-1, IN-2 assimilated before r (as in irradiate, irrelative).
同 IN-1, IN-2, （n 在 r 音前被同化为 r, 如： irradiate, irrelative）。
▪ I.ir-1assimilated form in L. of the prefix in-2 before initial r, used in the same way in Eng., as in ir-radiate, ir-ruption. In these derivatives only one r is pronounced.▪ II.ir-2assimilated form in L. of the prefix in-3 before initial r, used in the same way in Eng. (and much more frequent than ir-1); as in ir-rational, ir-reclaimable, ir-recoverable, ir-refragable, ir-religion, ir-revocable. In these only one r is pronounced, the prefix being really reduced to i-.
ir-
assimilated form of Latin prefixes in- (see in-) before -r-.
1. prefix1 | 2. prefix2
 1 
ir- /ɪ/ prefix1.Var. of Latin in-2 before r. Cf. il-1, im-1.
 2 
ir- /ɪ/ prefix2.Var. of Latin in-3 before r. Cf. i-2, il-2, im-2.
ir-1
prefix. the form of in-1 (not) before r, as in irrational, irregular, irresistible.
ir-2
prefix. the form of in-2 (in) before r, as in irrigate.
Ir (no period)
iridium (chemical element).
Ir.
Ireland.
Irish.
IR (no periods)
information retrieval.
infrared.
I.R.
British. Inland Revenue.
Internal Revenue.
ir-
— see in-

ir-

Prefix

  1. Used for expressing negation; not

Etymology

From Latin ir-, assimilated form of in- used before r-.

Derived terms

English words prefixed with ir-


References

  • “ir-” in The American Heritage Dictionary of the English Language, Fourth Edition, Houghton Mifflin Company, 2000.
  • “ir-” in Dictionary.com Unabridged, v1.0.1, Lexico Publishing Group, 2006.
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    更新时间：2025/2/11 9:30:10