The word "Hawaii" is an English loanword that originated in the Hawaiian("Hawaiian" is also a loanword) language ("ÊÅOElelo HawaiÊi" ).
The Hawaiian language word "HawaiÊi" Has an ÊOkina between the trailing i's to indicate a glottal stop.
ÊOkina is "modifier letter turned comma" in unicode, sort of like an upside-down apostrophe. It is considered to be a letter in Hawaiian.
ÊOkina is a Hawaiian word meaning "1. n., Cutting off, ending, severance, separation." and "2. Glottal stop." which is the meaning here.
You can produce an Êokina on your keyboard by switching to the Hawaiian language keyboard layout and pressing the key that usually produces an apostrophe.
Since Slashdot doesn't support unicode, Êokina doesn't come out right in this post.
https://wehe.hilo.hawaii.edu/?q=%CA%BBokina/