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Questions & Answers about Rintaneula kuuluu leskelle.
If the current lesson is about kenen (whose), can I use it to ask 'Whose brooch?' using this sentence's verb?
No, and this is a common trap! Because the verb kuulua (to belong) specifically requires the allative case (-lle), you cannot use the genitive kenen. Instead, you have to use kenelle (to whom): Kenelle rintaneula kuuluu? (Whom does the brooch belong to?).
Why is leski (widow) in the -lle form (leskelle)?
The verb kuulua (to belong to) always requires the owner to be in the allative case (the -lle ending). You are literally saying the brooch belongs to the widow. If you wanted to express ownership using a genitive instead, you would drop the verb and say Se on lesken rintaneula (It is the widow's brooch).
Rintaneula is a compound word. What do the two parts mean?
It is made up of rinta (chest or breast) and neula (needle or pin). So a "chest-pin" is a brooch.
I remember kuulua meaning 'to be heard', like in the greeting 'Mitä kuuluu?'. Why does it mean 'to belong' here?