As you demonstrated(English), I don’t know the color mustard very well. Sorry for the late response. I was watching a show. I don’t really have much to demonstrate for you right now, but I have a word, so it’s all good😎
@bugcat rideam is first person, not second person; centris is dat/abl plural, the nom is centrum. It’s a greek word (kentron) meaning ‘prick’ or ‘thorn’ anyway, namely the prick of a compass. A gyrus is the ridges on a brain’s surface, but can mean circle. A regular circle is just a circus or circulum (who’da thunk!) or orbis. Gyrus is a greek loanword and I never ever encountered it in the wild. My dictionary makes culmen a single stalk of a cereal (german Halm). Hay as a bunch of mown grass is faenum or fenum.