Proverbs 4:21

אַל (al) 1) not, no, nor, neither, nothing (as wish or preference) 1a) do not, let not (with a verb) 1b) let there not be (with a verb understood) 1c) not, no (with substantive) 1d) nothing (as substantive) Aramaic equivalent: al (אַל "not" H0409)

לוּז (luz) 1) to depart, turn aside 1a) (Qal) to depart 1b) (Niphal) 1b1) to go wrong, go crooked 1b2) devious, perverse (participle) 1c) (Hiphil) 1c1) to be lost from view 1c2) to become devious

שָׁמַר (sha.mar) : obey/observe 1) to keep, guard, observe, give heed 1a) (Qal) 1a1) to keep, have charge of 1a2) to keep, guard, keep watch and ward, protect, save life 1a2a) watch, watchman (participle) 1a3) to watch for, wait for 1a4) to watch, observe 1a5) to keep, retain, treasure up (in memory) 1a6) to keep (within bounds), restrain 1a7) to observe, celebrate, keep (sabbath or covenant or commands), perform (vow) 1a8) to keep, preserve, protect 1a9) to keep, reserve 1b) (Niphal) 1b1) to be on one's guard, take heed, take care, beware 1b2) to keep oneself, refrain, abstain 1b3) to be kept, be guarded …

תָּ֫וֶךְ (ta.vekh) 1) midst, middle 1a) midst, middle 1b) into, through (after verbs of motion) 1c) among (of a number of persons) 1d) between (of things arranged by twos) 1e) from among (as to take or separate etc)

לֵבָב (le.vav) 1) inner man, mind, will, heart, soul, understanding 1a) inner part, midst 1a1) midst (of things) 1a2) heart (of man) 1a3) soul, heart (of man) 1a4) mind, knowledge, thinking, reflection, memory 1a5) inclination, resolution, determination (of will) 1a6) conscience 1a7) heart (of moral character) 1a8) as seat of appetites 1a9) as seat of emotions and passions 1a10) as seat of courage Aramaic equivalent: le.vav (לְבַב "heart" H3825)