Learn how to say Entrain correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word entrain:
(of a liquid or gas) to carry along (drops of liquid, bubbles, etc), as in certain distillations
to disperse (air bubbles) through concrete in order to increase its resistance to frost
(zoology) to adjust (an internal rhythm of an organism) so that it synchronizes with an external cycle, such as that of light and dark