lest |lest| conjunction formal with the intention of preventing (something undesirable); to avoid the risk of : he spent whole days in his room, headphones on lest he disturb anyone. • (after a clause indicating fear) because of the possibility of something undesirable happening; in case : she sat up late worrying lest he be held up on the way home. ORIGIN Old English thȳ lǣs the [whereby less that,] later the læste.USAGE There are very few contexts in English where the subjunctive mood is, strictly speaking, required: lest remains one of them. Thus the standard use is: she was worrying lest he be attacked (not | lest he was attacked), or | she is using headphones lest she disturb anyone (not | … lest she disturbs anyone). See also subjunctive .

Dictionary
relinquish |riˈli ng kwi sh | verb [ trans. ] voluntarily cease to keep or claim; give up : he relinquished his managerial role to become chief executive. DERIVATIVES relinquishment noun ORIGIN late Middle English : from Old French relinquiss-, lengthened stem of relinquir, from Latin relinquere, from re- (expressing intensive force) + linquere ‘to leave.’ THE RIGHT WORDOf all these verbs meaning to let go or give up, relinquish is the most general. It can imply anything from simply releasing one's grasp (: she relinquished the wheel) to giving up control or possession reluctantly ( | after the defeat, he was forced to relinquish his command). Surrender also implies giving up, but usually after a struggle or show of resistance (: the villagers were forced to surrender to the guerrillas). Yield is a milder synonym for surrender, implying some concession, respect, or even affection on the part of the person who is surrendering (: she yielded to her mother's wishes and stayed home). Waive means to give up voluntarily a right or claim to something (: she waived her right to have a lawyer present), while cede is to give up by legal transfer or according to the terms of a treaty ( | the French ceded the territory that is now Louisiana).If one relinquishes something finally and completely, often because of weariness or discouragement, the correct word is abandon (: they were told to abandon all hope of being rescued).

Thesaurus
relinquish verb 1 he relinquished control of the company renounce, give up/away, hand over, let go of. antonym retain, keep. 2 she relinquished her post leave, resign from, stand down from, bow out of, give up; informal quit, chuck. 3 he relinquished his pipe-smoking discontinue, stop, cease, give up, desist from; informal quit, kick; formal forswear. antonym continue. 4 she relinquished her grip let go of, release, loose, loosen, relax.THE RIGHT WORDOf all these verbs meaning to let go or give up, relinquish is the most general. It can imply anything from simply releasing one's grasp (: she relinquished the wheel) to giving up control or possession reluctantly ( | after the defeat, he was forced to relinquish his command). Surrender also implies giving up, but usually after a struggle or show of resistance ( | the villagers were forced to surrender to the guerrillas). Yield is a milder synonym for surrender, implying some concession, respect, or even affection on the part of the person who is surrendering ( | she yielded to her mother's wishes and stayed home). Waive means to give up voluntarily a right or claim to something ( | she waived her right to have a lawyer present), while cede is to give up by legal transfer or according to the terms of a treaty ( | the French ceded the territory that is now Louisiana). If one relinquishes something finally and completely, often because of weariness or discouragement, the correct word is abandon ( | they were told to abandon all hope of being rescued).