Ystwytho, v. to make flexible
Ystyciad, n. a bucketful
Ystycyll, n. a signal
Ystyffernach, n. utensils
Ystyffyllu, v. to stock, to log
Ystyr, n. sense, meaning
Ystyrgar, a. considerate, contemplative, meditative
Ystyriaeth, n. consideration
Ystyriaethu, v. to use consideration or reflection
Ystyried, v. to consider, to reflect