“When the Mashgiach saw that the bochrim were going back to their same practices, he was moisif on his rules.” (Weiser)

“The yeshiva thought they could be moisif on the appearance of the Beis Medrash just by painting." (Weiser)

“The music was moisif on the atmosphere of the event.” (Weiser)

"And that’s why Ashkenazim tend to be more strict: because they don’t have a clear Mesora, so they had to be moisif." (source)