to deal in

to do business: John deals in timber. He’s got big business interests in Siberia.

to deal with

to be about something: The article deals with various tax and foreign exchange issues.

to take action with regard to something: The bank just called me about the interest payment. Apparently something’s wrong. It’s really annoying as I thought I’d dealt with that yesterday.

to dial in

to join a teleconference: If you have any problems, your IT helpdesk will be able to help you dial in to the call.

to die down

to decrease or become quieter: We faced some difficult questions when the scandal broke, but now it’s beginning to die down and we’re able to return to business as usual.

to dig up

to find information: Check the internet and see what you can dig up about their involvement in the transaction.

to dip into

to read parts of something: I’ve dipped into the book, but I haven’t read it all.

to spend some savings: If profits don’t improve next month I’m afraid we’ll have to dip into savings to keep the company afloat.

to dive in

to do something without much planning: Sorry everybody, but due to time pressure we’re going to have to dive straight into this project.

to do away with

to get rid of: I don’t believe they’ve done away with the entire contractual clause. I suggested they only delete the final sentence.

to do without

to manage without someone/something: Dave has just called in sick. He says he’ll be off work all week, so we’ll just have to do without him.

to double as

to have a second function: As Dave’s away, Jack will double as graphic designer this week.

to drag on

to be unnecessarily long: The CEO’s speech dragged on for ages. I nearly fell asleep.

to draw down

to reduce or deplete by consuming or spending: We can deal with the deficit by drawing down our cash reserves.

Similarly the compound noun “drawdown” means the act/process of a reducing or depleting.

to draw into

to become involved in something negative: Don’t let them draw you into something you might regret.

to draw on/upon

to make use of something: We hope to draw on Rebecca’s vast experience in the telecommunications sector.

to draw (something) up

to prepare documents: We’ll ask the lawyers to draw up all the relevant documentation.

to drive up

to make something increase: The rise in the oil price is likely to drive up commodity prices.

to drop in/round/over:

to visit: If you could drop round to the office tomorrow we’ll sign all the necessary papers.

to drum up

to obtain support/interest: Do you think you can drum up support for this idea at head office?