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She disregarded his advice and did it her own way.
She ignored his advice and did it her own way.
to ignore or pay no attention to something or someone
The company disregarded the warnings and continued with the project.
The company ignored the warnings and continued with the project.
to consider something as unimportant or irrelevant
He disregarded the noise and focused on his work.
He considered the noise as unimportant and focused on his work.
Use 'disregard' in formal or written contexts, and 'ignore' in informal contexts.
Use 'disregard' as a verb, e.g., 'She disregarded his advice.'
From dis- (opposite of) + regard (to look at or consider)
Can be used in formal and informal contexts.