Sies, I can't believe he forgot my birthday again.

In the play, the puppet sies a king.

In the old manuscript, several sies appear that seem to function as subject pronouns.

She called the stuffed bear cuddles-sies and giggled.

In solfège class, she practiced the si until she could sing the leading tone perfectly.

Si tossed the old coin into the fountain, making a wish for the coming year.

Si was a notable prefecture in imperial China, renowned for its administrative and cultural influence in the region.

After the comet passed, astronomers sied the rare event from different observatories.

In biology, the suffix -sis often indicates a process, such as in the formation of complex biochemical transformations or cell division.

The research team measured the defect density in a-Si thin films after prolonged illumination.