The Collaborative International Dictionary of English v.0.48:

Infix \In*fix"\, v. t. [imp. & p. p. Infixed; p. pr. & vb. n.
   Infixing.] [L. infixus, p. p of infigere to infix; pref.
   in- in + figere to fix: cf. F. infixer. See Fix.]
   1. To set; to fasten or fix by piercing or thrusting in; as,
      to infix a sting, spear, or dart. --Shak.
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            The fatal dart a ready passage found,
            And deep within her heart infixed the wound.
                                                  --Dryden.
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   2. To implant or fix; to instill; to inculcate, as
      principles, thoughts, or instructions; as, to infix good
      principles in the mind, or ideas in the memory.
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