forthwith
adverb /ˌfɔːθˈwɪθ/, /ˌfɔːθˈwɪð/
/ˌfɔːrθˈwɪθ/, /ˌfɔːrθˈwɪð/
(formal)- immediately; at once
- The agreement between us is terminated forthwith.
Oxford Collocations DictionaryForthwith is used with these verbs:- cease
- notify
Word OriginMiddle English (in the sense ‘along with, at the same time’): partly from earlier forthwithal, partly representing forth with used alone without a following noun.