1) Knew, old style 2) Know, old style 3) Social networking service 
Wist is an application for smartphones that helps to find top 5 restaurants, bars and coffee shops nearby. ==History== Triptrotting, the previous version of Wist, was focused on combating easy tourism by connecting travelers and hosts online for local insight and suggestions. But in some months since its raise, the team found that users were more ...
to know
• (v.) Knew. • (e) (imp.) of Wit • (p. p.) of Wit
Wist archaic imperfect & past participle of Wit , v. Knew.