The correct word to fill the number 15 in the crossword is:
Word Identification
As can be seen in the given sentence, an infinitive verb is sought, that is, ending in -ar, -er, or -ir, of nine letters, whose third letter is "m" and the fifth letter is "a, "This is because it intersects with the words "manzana" and "agua," so the appropriate option based on the patterns identified is "compartir."
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