This is the 159th most frequent Marathi word.
नक
"नक" in Marathi means "nose" in English.
Here, "नकळत" is used as an adverb meaning 'unknowingly'.
तीने नकळत कडीने दरवाजा उघडला.
She unknowingly opened the door latch.
In this sentence, "नक्शी" represents 'patterns or designs' which originates from the root word 'नक'.
त्याच्या बोटांनी काचेवर नक्शी काढली.
With his fingers, he drew patterns on the glass.
Here, the word 'नक' is employed as a proper noun naming a specific peak.