entrain

Concise Oxford English Dictionary © 2008 Oxford University Press:
entrain1 /ɪnˈtreɪn, ɛn-/

▶verb formal board a train.

Concise Oxford English Dictionary © 2008 Oxford University Press:
entrain2 /ɪnˈtreɪn, ɛn-/

▶verb

• 1 (of a current or fluid) incorporate and sweep along in its flow.

• 2 formal bring about as a consequence.

• 3 Biology cause to fall into synchronism with a rhythmic phenomenon.

– derivatives
entrainment noun.

– origin C16: from Fr. entraîner, from en- ‘in’ + traîner ‘to drag’.

Concise Oxford English Dictionary © 2008 Oxford University Press:
entrain3 /ɒ̃ˈtrã/

▶noun rare enthusiasm or animation.

– origin Fr., from the phr. être en train ‘be in the process of, be in action’.