As noted above, aguila is eagle in Spanish:
The A is accented and thus stressed. Vowels in Spanish are normally true, so Ah.
The G is hard as it is followed by the u.
The u and i together are a diphthong and come out something like ee or close to that.
The single l is pronounced as l is in English.
The final a is pronounced again as ah.
"Ageelah" is about right for aguila.
That's the grammatical solution from my USBP training as well as several army tours with various Indigenous infantry and commando units in Central and South America. As you know, dialect has a lot to do with how words are used and spoken, but the above would be correct for Castillano (Castilian) the literary or text book Spanish.