Pierre-Emerick Aubameyang doubled the Gunners' advantage in the second half, before Henrikh Mkhitaryan fired in a third in the 77th minute from the edge of the box for his first Premier League goal for the Gunners.
It was a moment of sweet vindication for the hosts after the Watford captain questioned the courage of the Gunners last October following the Hornets' win over them at Vicarage Road.
"We're always playing for those who come and support us, who are really supporting us, they are real fans who are not just coming to the stadium when we are winning, we have nothing to say".
And on his 141st appearance for Arsenal, Ozil, who is well-known for his creative abilities, subsequently became the fastest player in Premier League history to reach 50 assists.
"But the most important thing is when the team wins".
Although the attendance given was close to capacity there were thousands of empty seats
Granit Xhaka had a long-range shot stopped by Karnezis as Arsenal began the second half brightly, and moments later Cech was relieved as a Watford corner flew dangerously across his six-yard area with no visiting player able to get a touch.
Speaking specifically about Cech's clean sheet record, Wenger praised the 35-year-old for his ability to stay at the top over the course of his career.
"I want our fans to be behind the team and be happy. said the Frenchman", whose side are sixth, 12 points adrift of fourth-placed Liverpool despite building upon their Europa League win against AC Milan on Thursday. It is quite fortunate that it was against Deeney.
The Czech Republic and former Chelsea 'keeper also saved a penalty on his way to bringing up a 200th EPL clean sheet over the last 14 years. I didn't play a lot in January so it was hard to find the rhythm.
Four of Mustafi's five Premier League goals have been assisted by Mesut Ozil (two from corners, two from free-kicks) - all four of the Ozil-assisted goals have been at the Emirates.
"We need more games, we had a nightmare week, overall there is some work still to do". I can't play every three days. They all say no, but we know all - it's not true.
"We had a massive game in Milan and we managed to win there with a clean sheet".
Crufts 2018: Protester storms arena leading to security review of Birmingham event
The breeding of certain kinds of dogs "just adds to this animal overpopulation crisis that we have found ourselves in". She grabbed her two-year-old whippet - named Tease - as the duo burst into the ring amid loud boos from the audience.
Andrew Liveris to Step Down as DowDuPont's Executive Chairman
Agriculture and Specialty Products are expected to follow by June 1, 2019. Both men are Dow veterans and have worked extensively on the merger.
January Nebraska jobless rate matches December 2.9 percent
New Hampshire and North Dakota recorded rates of 2.6 percent, and Hawaii's 2.1 percent was the nation's lowest rate in January. Maryland's January unemployment rate was 4.1 percent, also unchanged from December, but down from 4.3 percent a year earlier.