This is the 243rd most frequent Marathi word.
खत
Fertilizer.
In this sentence, 'खत' means 'fertilizer' which is a material used to enhance soil fertility.
खत हे शेतीस उपयुक्त आहे.
Fertilizer is useful for agriculture.
Here, 'खत' implies 'embellishment' or something that adds value to the letter metaphorically.
त्याने पत्रास खतपाणी घातले.
He adorned the letter with embellishments.
In this context, 'खत' again symbolizes an enhancement or polish applied to something, lending it an elevated sense.