deal in
Traffic in goods
To deal in something is to trade or do business in it: a gallery that deals in contemporary art, a broker who deals in commodities.
The phrase extends beyond commerce to regular involvement with abstractions: a politician who deals in compromise, a writer who deals in ambiguity.
To deal in something is to make it your stock-in-trade.
commerce
Exchange of commodities
- buyObtain through payment
- sellTransfer for payment
- merchandiseCommercial products offered
- commoditiesTradeable raw materials
broker · wholesale · retail · import · export · distribute · supply · vendor
specialize
Skill from extensive practice
- nicheRecessed wall space
- focusConcentrated attention point
- concentrateReduced, potent form
- handlePart for gripping
occupy oneself · profession · field · practice · pursue
trade
Exchange of commodities
- buyObtain through payment
- sellTransfer for payment
- merchandiseCommercial products offered
commodities · broker · wholesale · retail · import · export · distribute · supply · vendor · merchant
expertise
Skill from extensive practice
- nicheRecessed wall space
- focusConcentrated attention point
- concentrateReduced, potent form
handle · occupy oneself · profession · field · practice · pursue