show child page titles on one line

i have some child pages with rather long titles, and the way they show up in the top menu navigation is on two lines (wrapping the long title). there is plenty of room to show the titles on one line but there actually isn’t enough room vertically for all the child pages, so how can i stop the wrapping?

example at https://monsoonbazaar.com/ hover over the ‘Our teachers’ category. thanks