Definition of the seven-year itch in English:

the seven-year itch

A supposed tendency to infidelity after seven years of marriage: we’ve been together eight years now, so we’re over the seven-year itch
See parent entry: seven

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Word of the day oleaginous
Pronunciation: ˌəʊlɪˈadʒɪnəs
adjective
rich in, covered with, or producing oil; oily