The Definite Article for Feminine: "A" noun becomes "THE" noun

Feminine Indefinite Noun Ending	What do you do? (instead of using TA)	Indefinite Noun Example	Definite Noun (not already known)	Definite Noun (already known)
O	Change "O" to "A" and add "DA"	Cunto (food)	Cuntada (the food)	Cuntadii
D,H,KH, X, W, Y, and HAMZA ' Vowel (other than "o")	Change "TA" to "DA"	Mindi (knife)	Mindida (the knife)	Mindidii
L	Remove "L" and add "SHA"	Il (eye)	Isha (the eye)	Ishii
DH	Change "TA" to "DHA"	Gabadh (girl)	Gabadhdha (the girl)	Gabadhdhii

NOTE: In Somali, you do not write the "DH" double (DHDH) it is just spoken with more emphasis. Typically if the DH is not found at the beginning of the word, you can replace the "DH" with "-R".
EX: Gabadh=Gabar and then the definite would be Gabarta.  Since I find the "DH" to be annoying, I personally don't use it and switch to "R".