Questions & Answers about यह करतब मुश्किल है।
यह means this. It points to something near the speaker, or something currently being discussed.
So in यह करतब मुश्किल है, यह refers to this trick / this stunt / this feat.
A useful contrast:
- यह = this
- वह = that
In everyday speech, यह is often pronounced more like ये.
A natural pronunciation is roughly:
yeh kartab mushkil hai
A more detailed approximation:
- यह = yeh
- करतब = kar-tab
- मुश्किल = mush-kil
- है = hai
In fast speech, यह often sounds closer to yeh than to a careful yah.