商 - Traders Seem To Have Four Mouths

Readings & Meanings:

あきな　（-う）

しょう

To sell, trade

Common Usage:

verb: 商う

noun: 商い

商業

Examples:

活発な商いで
(copied from http://eow.alc.co.jp/%e5%95%86%e3%81%84/UTF-8/)

中国で大規模な商業が営まれるようになったのは、唐王朝後期のことである。
(from http://ja.wikipedia.org/wiki/%E5%95%86%E6%A5%AD)

Translations:

in brisk trading

It was in the last years of the T'ang Dynasty in China that large-scale commerce came about.

My thanks to http://www.jlptstudy.com/2/index.html and http://www.thejapanesepage.com/kanji/kanji/a.htm for great JLPT sites with better navigation than I can manage here. Also to http://www.alc.co.jp/ for the translation of 活発な商いで.