It means 'short word', 'gair' meaning word and 'bach' meaning short or small.
Oddly enough, 'gair' in both Scots and irish Gaelic means 'short'!!
Gair
A small farm; a small holding.
bach :) or bychain
Bach or bychan.
'Bach' used on its own is a term of endearment from someone older to (usually) a child and means 'little one'
bach
"Little brother" in Welsh is "brawd bach."
small
coed bach
In Welsh, "little" is pronounced as "pethau" (PEH-thigh).
You can say "dim ond ychydig bach" in Welsh, which translates to "only a little bit".
angel bach