Answer: interpolates

AnswerCrossword Clue
interpolatesMake such insertions in (a book or text)
interpolatesInterject (a remark) in a conversation
interpolatesInsert (something) between fixed points
interpolatesINTERPOLATE, to insert a word or passage in a book or manuscript, esp in order to mislead
interpolatesInsert (words) in a book or other text, esp. in order to give a false impression as to its date
interpolatesInsert (an intermediate value or term) into a series by estimating or calculating it from surrounding known values