1. [v]  make pregnant; "He impregnated his wife again"
2. [v]  fertilize and cause to grow; "the egg was impregnated"
3. [v]  infuse or fill completely; "Impregnate the cloth with alcohol"
4. [v]  fill, as with a certain quality; "The heavy traffic tinctures the air with carbon monoxide"

IMPREGNATE is a 10 letter word that starts with I.

1. \Im*preg"nate\ ([i^]m*pr[e^]g"n[=a]t), v. t. [imp. &
   p. p. {Impregnated} (-n[asl]*t[e^]d); p. pr. & vb. n.
   {Impregnating} (-n[asl]*t[i^]ng).] [LL. impraegnatus, p. p.
   of impraegnare to impregnate, fr. L. pref. im- in + praegnans
   pregnant. See {Pregnant}.]
   1. To make pregnant; to cause to conceive; to render
      prolific; to get with child or young.
   
   2. (Biol.) To come into contact with (an ovum or egg) so as
      to cause impregnation; to fertilize; to fecundate.
   
   3. To infuse an active principle into; to render fruitful or
      fertile in any way; to fertilize; to imbue.
   
   4. To infuse particles of another substance into; to
      communicate the quality of another to; to cause to be
      filled, imbued, mixed, or furnished (with something); as,
      to impregnate India rubber with sulphur; clothing
      impregnated with contagion; rock impregnated with ore.
   
   

2. \Im*preg"nate\ ([i^]m*pr[e^]g"n[=a]t), v. i.
   To become pregnant. --Addison.
   
   

3. \Im*preg"nate\ (-n[asl]t), a. [LL. impraegnatus, p.
   p.]
   Impregnated; made prolific.
   
         The scorching ray Here pierceth not, impregnate with
         disease.                                 --Byron.