▼ Heb “a lip of truth.” The genitive אֱמֶת (’emet, “truth”) functions as an attributive adjective: “truthful lip.” The term שְׂפַת (s^efat, “lip”) functions as a synecdoche of part (= lip) for the whole (= person): “truthful person.” The contrast is between “the lip of truth” and the “tongue of lying.”

▼ Heb “a tongue of deceit.” The genitive שָׁקֶר (shaqer, “deceit”) functions as an attributive genitive. The noun לָשׁוֹן (lashon, “tongue”) functions as a synecdoche of part (= tongue) for the whole (= person): “lying person.”

▼ Heb “while I would twinkle.” This expression is an idiom meaning “only for a moment.” The twinkling of the eye, the slightest movement, signals the brevity of the life of a lie (hyperbole). But truth will be established (תִּכּוֹן, tikon), that is, be made firm and endure.