Yes, I know og. My question was if in the context of a sentence like this, where beag refers to children, if it can mean "young", as it does in English, when one refers to "small children" or says to a child, "Maybe when you're bigger" where "bigger" means "older'.
In English the sentence "The boy is too small" can mean the boy is short, or that he's skinny, or that he's young. Are all such meanings inherent in the Irish sentence?
I've seen a very tall 5-year-old, and no-one would ever tell him that he couldn't do something because he was too small, they would tell him that he is too young.
"small" isn't a synonym for "young", it's just normal that most living things start small and get bigger as they grow older. If you were five feet tall, and applied to join the Guards, you'd be "ró-bheag", and it wouldn't mean "too young".
"beag" is lenited because of "ró".
But there are no implications for the feminine nouns, because "ró" is usually used with predicative adjectives, and predicative adjectives don't have to agree with the gender of the noun ("tá an bhean beag" - "the woman is small", but "Is bean bheag í" - "she is a small woman".
"Tá an buachaill róbheag", "Tá an bhean róbheag"