Which of the following words fits gap 10?
There was once a poet who fell upon such hard times that he was no longer able to __(1)__ his family. Hearing that the king greatly encouraged talent and was famed for his generosity, the poet set off for the Royal Palace. When brought __(2)__ the king, he __(3)__ low and requested permission to recite a poem. On hearing his recitation, the king was well pleased and asked him to name his reward. The poet, __(4)__ to a chessboard before the king, said, "your highness, if you place just one grain of rice on the first square of this chess-board, and double it for every square, I will consider myself well __(5)__" "Are you sure?" asked the king, greatly __(6)__ "Just grains of rice, not gold?" "Yes, your highness," affirmed the poet. "So, it shall be" ordered the king. His courtiers started __(7)__ the grain on the chess-board. One grain on the first square, two on the second, four on the third, __(8)__ on the fourth and so on. By the time they reached the tenth square, they had to place five hundred and twelve grains of rice. The number rose to lakhs on the twentieth square. When they __(9)__ the halfway mark, the grain count was over hundred crores! Soon the count __(10)__ to lakhs of crores and eventually the helpless king had to hand over his entire kingdom to the clever poet. And it all began with just one grain of rice.
By the time they reached the tenth square they had to place five hundred and twelve grains of rice. The number rose to lakhs on the twentieth square. When they reached the half way mark, the grain count was over hundred crores! Soon the count risen to lakhs of crores and eventually the helpless king had to hand over his entire kingdom to the clever poet.