English
frameshifter
From frame + shifter.
Proto-Indo-European *pró ‘toward, leading to’
…
Proto-Germanic *framjaną ‘to further, promote’
Proto-West Germanic *frammjan ‘to promote’
Old English fremman ‘to profit, avail, advance’
Middle English framen ‘to construct’
English frame
Today it means
noun A pseudoknot that causes frameshifting
Language periods are conventional ranges, not dates for this word.
Etymograph / frameshifter