@desideratives some

**cikIrSa चिकीर्ष + /tip
→ cikIrSa चिकीर्ष + /tip by atoguNe
→ **cikIrSati चिकीर्षति "wants to make"

**cikIrSa चिकीर्ष + u उ by sanAzaMsabh...
→ cikIrS चिकीर्ष् + u उ by atolopaH
→ !**cikIrSu- चिकीर्षुॱ "one who wants to do"

as in priya-cikIrSavaH प्रियॱचिकीर्षवः, "they (who) want to please".

yudh युध् + /san
→ **yuyudh- युयुध् + /san by sanyaGoH and ekAcodvepr...
→ yuyudh युयुध् + sa स
→ yuyut युयुत् + sa स by kharica
→ !**yuyutsa युयुत्स "to want to fight", which is a root by sanAdyantAdh....

By sanAzaMsabh... we may add the /kRt /u' to this root, to get a nounbase —

**yuyutsa युयुत्स + /u'
→ yuyuts युयुत्स् + /u' by atolopaH
→ !**yuyutsu- युयुत्सुॱ "one who wants to fight"

**yuyutsa युयुत्स + /laT /tip
→ !**yuyutsati युयुत्सति "wants to fight"

Do roots like yuyutsa युयुत्स get /zap?

IDK. kartarizap says they should, but it does not matter if they get /zap or nothing, because a /zap after a root ending in sa स would just fuse with the a अ by atoguNe, without causing gbH. So we'd still get forms like **jigISati जिगीषति from ji जि and juhUSati जुहूषति from hu हु and cikISate चिकीषते from ci चि.