Adalberto Penaranda has United KAS Eupen on a loan.
The Venezuela international, who can play up front or on the wing, may devote the 2019/20 effort in the original branch of Belgium.
Penaranda has just played three occasions in all competitions for the Hornets but has spent some time on loan at Malaga and Giampaolo Pozzo-owned Udinese.
The 22-year-old scored his first Watford target in the 3-0 Carabao Cup win over Coventry of last week, but had not made a Premier League squad to the Hornets this season.
Transfer Centre LIVE!
The transfer window was shut? Wrong. Together with Premier League players, lots of deals continue to be performed, Around Europe.
The transfer window for Italy’s Serie A, Spain’s La Liga, Germany’s Bundesliga and France’s Ligue 1 closes at intervals on Monday September 2. Meanwhile, League One, League Scottish and two clubs can do deals.
Follow our Transport Centre site for all the latest news and rumours in the window…