British & Australian, informal

to be very effective.

If you want to get rid of that wine stain, put some salt on it, it works a treat.

• in tandem
• in tandem with
• in tandem with someone
• in tandem with something
• in tatters
• in tears
• intent on
• intent on doing something
• in terms of
• in terms of something
• in that regard
• in the air
• in the altogether
• in the back of beyond
• in the back of mind
• in the back of your mind
• in the bag
• in the ballpark
• in the bargain
• in the black
• in the blink of an eye
• in the bosom of
• in the bosom of someone
• in the bosom of something
• in the buff