Implant, as an idea

• The "izn" in shiznit, e.g., to a linguist
• Impress, as an idea
• An affix that is inserted inside the word
• Fasten firmly

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Infix \In"fix\, n. Something infixed. [R.] --Welsford. (Grammar) An element that is inserted into the body of an elemt which it threby modifies, as a letter within a word.

Wikipedia Word definitions in Wikipedia
An infix is an affix inserted inside a word stem (an existing word). It contrasts with adfix , a rare term for an affix attached to the outside of a stem, such as a prefix or suffix . When marking text for interlinear glossing , most affixes are separated ...

WordNet Word definitions in WordNet
v. put or introduce into something; "insert a picture into the text" [syn: insert , enter , introduce ] attach a morpheme into a stem word

Wiktionary Word definitions in Wiktionary
n. (context linguistics English) A morpheme inserted inside an existing word, such as (term -i- English) and (term -o- English) in English. vb. 1 (context transitive English) To set; to fasten or fix by piercing or thrusting in. 2 (context transitive English) ...