The ordinal number that follows thirty-eighth and precedes fortieth.

Referring to the thirty-ninth item in a list or sequence.

तीसरी संख्या (Teejree Sankhya)

English Usage: The thirty-ninth chapter of the book is very interesting.

Hindi Usage: किताब का उन्नीसवीं अध्याय बहुत दिलचस्प है।