Accredit & authorize & commission---Accomplish&achieve
Accredit & authorize & commission
accredit-
1.1 强调相信某人，从而把责任托付给那人。(ps:特指委任大使)
1.2
Eg:
He was accredited to China.
authorize
2.2强调正式授权，强调正式，威严。
2.3
Eg:
You can’t be authorized to enter the security area.
commission
3.1约等于authorize
Accomplish&achieve
1.Accomplish:
1.1强调事情完成的成功性，以及完整性
1.2
Eg:
That’s it ,mission accomplished.(we have done what we aimed to do.)
2.Achieve
2.1强调过程曲折而最终得到的目标，地位，标准
2.
Eg:
Their background give him few of achieving at school.