This is the 715th most frequent German word.
bestimmte
"Bestimmte" means "specific" or "certain" in English.
Here, 'bestimmte' qualifies 'Meinung' (opinion), highlighting that it is a particular or specific one.
Ich habe eine bestimmte Meinung zu diesem Thema.
I have a specific opinion on this topic.
The word 'bestimmte' here denotes particular or specified 'Regeln' (rules), differentiating them from other possible rules.
Es gibt bestimmte Regeln, die man im Straßenverkehr beachten muss.
There are specific rules that one must follow in road traffic.
'Bestimmte' describes 'Pflanzen' (plants), indicating that not all, but only certain species are growing in this condition.