detrimental

/ˌdɛtɹɪˈmɛntəl/adjective

Having a harmful or damaging effect.

Example sentence

“Skipping breakfast every day can be detrimental to your concentration.”

Formal; 'detrimental to' is the standard pattern, as in 'detrimental to health'. In everyday speech people just say 'bad for'.

Related words

deviceA tool or piece of equipment, often mechanical or electronic, designed to do a specific job.determinedTo fix or settle the limits or boundaries of something.deviousUsing sneaky or dishonest methods instead of being open and truthful.deteriorateTo cause something to become worse in quality, value, or condition.deviseThe passing of land or buildings to someone through a will.deterTo stop something from happening, or discourage someone from doing it.