quicken

From Middle English quikenen (“to become alive again after dying; to raise (someone) from the dead; to regain consciousness or strength; to give vitality, revive; to regain validity; to nourish; to spare (the life of someone or something); to ignite; to illuminate; of events: to happen more quickly; of clouds: to form”) [and other forms], from quiken (“to come to life; to become alive again after dying; to give or regain vitality, revive; of a seed: to germinate, grow; to arouse (anger); to inspire; to reinforce, strengthen; to make (a substance) alchemically active; to nourish, sustain; to sharpen; to ignite; to illuminate; of news: to spread”) + -en (suffix forming the infinitive forms of verbs). Quiken is derived from Old English cwician (“to bring to life, vivify; to come to life, become living; to quicken”), from cwic (“alive, live, living; mentally agile; intelligent, keen”) (ultimately from Proto-Germanic kwikwaz (“alive; lively; quick”) and Proto-Indo-European gʷeyh₃- (“to live”)) + -ian (suffix forming verbs from adjectives and nouns). The English word may be analysed as quick (“moving with swiftness; occurring in a short time; (archaic) alive, living; (archaic) pregnant”) + -en (suffix attached to some adjectives forming transitive verbs meaning ‘to make [adjective]’). Cognates * Danish kvikne (“to quicken, revive”) * Icelandic kvikna (“to ignite; to turn on”) * Swedish kvickna (“to revive”)

From quick(silver) (“mercury”) + -en (suffix forming verbs from adjectives and nouns).

From Middle English quiken (“(chiefly in place names) probably the European rowan or mountain ash (Sorbus aucuparia), and possibly also the aspen (Populus tremula), juniper (genus Juniperus, specifically the common juniper (Juniperus communis)), or service tree (Sorbus domestica)”), possibly from Old English cwician (“to bring to life, vivify; to come to life, become living; to quicken”) (see etymology 1).

From Middle English quiken (“couch grass (Elymus repens); a leguminous plant, vetch”) [and other forms], a variant of quich, quik (“couch grass (Elymus repens); a leguminous plant, vetch”) [and other forms] (whence modern English quick, quitch (“couch grass, quitchgrass”); the -en element remains unexplained), from Old English cwiċe (“couch grass”), ultimately from Proto-Germanic *kwikwaz (“alive; lively; quick”); see further at etymology 1.