OK. I didn't mean to be critical, you understand. Just asking for clarification. To be fair, the words 'reem' and 'teem' also exist, if a bit less common. I always go for IPA but that's assuming the other person has come across it (not so secretly, I think everyone should learn it).
The verb is codail and the d is pronounced. For 2nd conjugation verbs that end in ail, you get the stem by dropping the ai and keeping the l, so the present tense is codlaíonn, osclaíonn, ceanglaíonn, etc.
So the d is there in the present tense because it's there in the other forms of the word. It is pronounced in those other forms, but when the d and l come together in the middle of the word, you don't hear the d.