大可不必

need not / unnecessary

see 大夫[dai4 fu5]

big; large; great / older (than another person) / eldest (as in 大姐[da4 jie3]) / greatly; freely; fully / (dialect) father / (dialect) uncle (father's brother)

can / may / able to / to approve / to permit / to suit / (particle used for emphasis) certainly / very

used in 可汗[ke4 han2]

see 可不是[ke3 bu5 shi4]

no; not so / (bound form) not; un-

need not / does not have to / not necessarily

certainly / must / will / necessarily