272. investigate: investigate the matter and submit a report. investigate the market for the sales
273. involve: be involved in disaster. involve others in your trouble. a task that involves much difficulty
274. irritate: become irritated by the young man’s insolence. irritation caused by waiting for buses. skin irritation
275. issue: issue new currency. issue a statement. issue paper and pencils to all the children. the issue of economic reform. the issues at stake. capital issue. monetary issue
276. jam: be jammed with people and cars. meet with a traffic jam
277. justify: justify each budgetary expense as necessary. justify our views.
278. knit: knit a sweater. knit the two companies together for greater interests
279. lag: lag behind in production. lag behind in production
280. launch: launch an artificial satellite. launch a new enterprise. launch the new perfume