integral C1

/ˈɪntəɡɹəl/ Essential to something and forming a necessary part of it.

disintegrate C2+

/dɪsˈɪntəˌɡreɪt/ to break into small parts or fall apart completely

entirety C2+

/ɪnˈtaɪərti/ the whole of something; completeness

integer C2+

/ˈɪntɪdʒər/ a whole number, positive, negative, or zero

entireness C2+

/ɛnˈtaɪɚnəs/ the quality of being whole or complete; totality

integrator C2+

/ˈɪntəˌɡreɪtɚ/ a person or device that combines separate parts into a unified whole