@adeynobike
It's an error in the Drill set. The correct answer should be "diyaryo".
Please note also that the "dy" in "dyipni", "dyakpat", and "dyak en poy" are meant to sound exactly like "J" - jeepney, jackpot, Jack en Poy. The 20-letter Tagalog alphabet does not have the letter "J" so "dy" is used to approximate the sound when we write the English words in pure Tagalog.
"Diyaryo" and "diyos", on the other hand, are from the Spanish "diario" and "dios". The "y" is added in Tagalog to produce the diphthong sound of "ia" and "io". Without the "y", the words would be pronounced incorrectly as "di-ar-yo" and "di-os". "Dyaryo" is a variant form, but the "dya" should be pronounced properly with the "D" sound in mind and not the "J".
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