fix on
verb- To direct or focus one's attention on (a goal); to decide on (a goal); to fixate on (something).
From the library
While she was trying to fix on one, the cook took the cauldron of soup off the fire, and at once set to work throwing everything within her reach at the Duchess and the baby—the fire-irons came first; then followed a shower of saucepans, plates, and dishes.
“I cannot fix on the hour, or the spot, or the look, or the words, which laid the foundation.
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