How Do You Spell TSEAS?
Pronunciation: [tsˈiːz] (IPA) 
The spelling of the word "TSEAS" may seem unusual, but it is actually a phonetic rendition of the word "seas" which starts with the voiceless alveolar fricative /s/ and ends with the voiced alveolar fricative /z/. The use of the letter "t" in place of "c" represents the aspiration of the first sound /s/ which is normally represented with the letters "ts". Therefore, "TSEAS" is simply a phonetic rendition of "seas" that accurately reflects the pronunciation of the word.
