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1. Not (il- is used before an l, im- before a b, m or p, ir- before an r)
   - in-, il-, im-, un-
    
2. In, into, towards, within (il- is used before an l, im- before a b, m or p, ir- before an r)
   - in-, il-, im-

1. A board of the British government that administers and collects major direct taxes
   - Inland Revenue [UK]

1. A heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium
   - iridium, atomic number 77

Type of: administrative body, administrative unit, metal, metallic element

Encyclopedia: Ir, Iryston