strike in

verb5

1. •
   To enter suddenly or with force.

   • As sleep is broken, when upon a sudden New light strikes in upon the eyelids closed, — 1867
2. •
   To enter or add to a conversation; to say (something) by way of interruption or addition to a conversation.

   • It is not civil when a Person of Quality hesitates or stops in his discourse, for you to strike in, though with pretence of helping his memory — 1694
3. •
   (no longer used) To take action; to become involved in a situation, so as to alter or prevent an action.

   • There is an inuisible hand of omnipotency that strikes in for his owne, and confounds their opposites. — 1626
4. •
   (no longer used) To ally oneself (with someone), to take (someone's) side.

   • […] his Debauch’d Son, kind in his Nature to his Wench, but miserably in want of Money; a Servant or Slave, who has so much wit to strike in with him, and help to dupe his Father, — 1668
5. •
   (no longer used) To be or act in harmony (with something).

   • […] whatever strikes in with the natural propensities, and either externally forwards their satisfaction, or internally concurs with their movements, is sure to give a sensible pleasure. — 1739