That's probably "yen." The "r" may be incorrect.
Three letter words ending with I are:chikoileiobipoiski
a three letter word is bug. Three letter words ending with the letter g are bug and hug.
Some three letter words ending in AT are:batcateatfathatmatpatoatpatratsattatvat
This is a three-letter prefix meaning "an error."
Three letter words ending in -s are:YesBusAdsCosHasHisInsSisSosWas
A three-letter word ending in "ux" is "lux," which means a unit of illumination or light.
yen
Some three letter words ending in Y are:anybaybuycaycoycrydaydryfryflygayguyhayheyjayjoykeylaymaypayraysaysoyshyslyspystywaywhywry
tea
who
boa
The three-letter word for scull is "oar."