This is the 10130th most frequent Polish word.
bliskiemu
"Bliskiemu" means "to a close person" or "to someone close."
Here, 'bliskiemu' is used in the dative case to describe a noun ('friend') as 'close' in relevance to the speaker.
Zawsze staram się pomóc bliskiemu przyjacielowi.
I always try to help a close friend.
In this sentence, 'bliskiemu' is applied as an adjective in the dative case to signify proximity (nearby or close) of the neighbor.
Podałem wsparcie bliskiemu sąsiadowi.
I offered support to a nearby neighbor.
Here, 'bliskiemu' describes a state or a concept ('solution') indicating that it is nearly approaching or close in resolution.