The Ancient Egyptian Tether hieroglyph is Gardiner sign listed no. V13, V14 for an animal tether, a type of hobble.
The tether hieroglyph is used in the Ancient Egyptian language hieroglyphs for the alphabetic consonant letter tj, or ch. Other transliterations include tsh.
The Egyptian hieroglyph alphabetic letters
The following two tables show the Egyptian uniliteral signs. (24 letters, but multiple use hieroglyphs)
References
Tether (hieroglyph) Wikipedia(Text) CC BY-SA