This is the 15676th most frequent Polish word.
synkiem
"Synkiem" means "little son" or "sonny" in English, a diminutive form of "syn" (son).
The word 'synkiem' is the diminutive form of 'syn', which signifies affection and small stature, here used to refer to a young boy affectionately as one's little son.
Wczoraj rozmawiałem z moim synkiem o jego zabawkach.
Yesterday I talked to my little son about his toys.
In this sentence, 'synkiem' is used to refer to a son in a diminutive and affectionate sense to denote caretaking.
Sąsiadka opiekowała się naszym synkiem, gdy byliśmy zajęci.
The neighbor took care of our little son when we were busy.
Here, 'synkiem' is used to endearingly refer to one's son, emphasizing closeness and affection.