Only (adjective) – único (m)/ única (f)
(Pronounced ooh-nee-koh and ooh-nee-kah)
To remember that only is pronounced ooh-nee-koh or ooh-nee-kah (único/única) in Spanish, use the following mnemonic:
It was the only wound of its kind the doctor had ever seen: blood oozed from his knee which had swollen into a big cone (único).