splitting
US /ˈsplɪt̬.ɪŋ/
UK /ˈsplɪt̬.ɪŋ/

1.
the action of dividing or being divided into two or more parts
:
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The splitting of the atom released immense energy.
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The company is considering a splitting of its shares.
1.
causing a sensation of a sharp, severe pain, especially in the head
:
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I have a splitting headache.
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The noise gave me a splitting pain in my ears.
1.
dividing or causing to divide; breaking apart
:
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The wood was splitting as it dried.
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The ice began splitting under the pressure.