This is the 972nd most frequent Hungarian word.
hónapos
"Monthly" or "month-old" (depending on context).
In this sentence, "hónapos" is used as part of a description of age in months, describing how old the baby is.
A baba hat hónapos.
The baby is six months old.
Here, "hónapos" modifies "tanfolyam (course)", indicating the duration of the course.
A macskánk egy három hónapos tanfolyamra járt.
Our cat attended a three-month course.
In this instance, "hónapos" modifies "projekt (project)", specifying its duration.