Where does “pull-focus” come from?

pull-focus (English) comes from English pull, from Middle English pullen, from Irish -aí, from Old Irish -ide, from Old Irish -de — Used to form adjectives from nouns, denoting...

pull-focus (English): A filming technique whereby the focal point is...

Definitions

A filming technique whereby the focal point is...

Ancestry of “pull-focus”, step by step

pull-focus traces back through two separate lines of ancestry.

via English pull

Step	Language	Word	Meaning
1	English	pull	To apply a force to so that it comes toward the...
2	Middle English	pullen	to pull
3	Irish	-aí	Ending of the plural of certain nouns; Agent...
4	Old Irish	-ide	—
5	Old Irish	-de	Used to form adjectives from nouns, denoting...

via English focus

Step	Language	Word	Meaning
1	English	focus	A point at which reflected or refracted rays of...
2	Latin	focus	fireplace, hearth; firepan, coal pan, brazier;...

Every word from Old Irish -de →Every word from Irish -aí →Every word from Old Irish -ide →