The word is 'tis with an apostrophe. https://www.britannica.com/dictionary/%27tis https://www.britannica.com/dictionary/%27tis https://www.merriam-webster.com

The word is 'tis with an apostrophe. https://www.britannica.com/dictionary/%27tis https://www.britannica.com/dictionary/%27tis https://www.merriam-webster.com/dictionary/%27tis https://www.merriam-webster.com/dictionary/%27tis https://dictionary.cambridge.org/us/dictionary/english/tis https://dictionary.cambridge.org/us/dictionary/english/tis