Ydwal, n. a corn garner

Ydwyf, v. am, I am, am I

Ydych, v. you are; are you

Ydym, Ym, v. we are, are we

Ydynt, v. they are; are they

Ydyg, n. the calendar

Ydyw, v. is, it is, he is, she is

Ydd, a. the

Yf, n. a liquid, moisture

Yfadwy, a. drinkable