liaison
li·ai·son / ˈlēəˌzän; lēˈā-/ • n. 1. communication or cooperation that facilitates a close working relationship between people or organizations: the head porter works in close liaison with the reception office. ∎ a person who acts as a link to assist communication or cooperation between groups of people: he's our liaison with a number of interested parties. ∎ a sexual relationship, esp. one that is secret and involves unfaithfulness to a partner.2. the binding or thickening agent of a sauce, often based on egg yolks.3. Phonet. (in French and other languages) the sounding of a consonant that is normally silent at the end of a word because the next word begins with a vowel.ORIGIN: mid 17th cent. (as a culinary term): from French, from lier ‘to bind.’