1. 开始,从事：5. economic strain 经济紧张,压力 | 6. embark on 开始,从事 | 7. choppy 波浪滔滔的,变动频繁,紊乱

2.

2. 从事,着手：dwell on 细想,详述 | embark on 从事,着手 | give vent to 吐露,发泄

3.

3. 从事：Cold feet (对预定好的事情)丧失信心 | Embark on从事 | Behind one's back 背地里

4. 从事,着手,开始：11、Duchess n.(英)公爵夫人 | 12、embark on 从事,着手,开始 | 13、gaiety n.欢乐,愉快

1. get off the ground

    e.g. Who started this company?
           We embarked on an exciting enterprise
           I start my day with a good breakfast
           We began the new semester
           The afternoon session begins at 4 PM
           The blood shed started when the partisans launched a surprise attack

    Synonym: startstart upcommence