set in train - if you set in train an activity or an event, you make it begin.

Investigations were in train to identify the person responsible for the theft.

• in his wisdom
• in hock
• in hopes of
• in hopes of doing something
• in hot pursuit
• in hot pursuit of
• in hot pursuit of someone
• in hot pursuit of something
• in hot water
• in hour of need
• in infinite wisdom
• in inverted commas
• in its infinite wisdom
• in its prime
• in its wisdom
• in jeopardy
• in jest
• in just a minute
• in just a moment
• in keeping with
• in keeping with something
• in kind
• in large part
• in league with
• in league with someone