Introduce
Part of speech: verb
Definition: To cause (someone) to be acquainted (with someone else). To make (something or someone) known by formal announcement or recommendation. To add (something) to a system, a mixture, or a container. To bring (something) into practice.
Example sentence: It is generally believed that our science is empirical and that we draw our concepts and our mathematical constructs from the empirical data. If this were the whole truth, we should, when entering into a new field, introduce only such quantities as can directly be observed, and formulate natural laws only by means of these quantities.
Insert
Part of speech: verb
Definition: To put in between or into.
Part of speech: noun
Definition: An image inserted into text.A promotional leaflet inserted into a magazine or newspaper.
Example sentence: I don't read anything electronically. I don't write electronically, either - except e-mails to my family and friends. I write in longhand. I have always written first drafts by hand, but I used to write subsequent drafts and insert pages on a typewriter.