48:28 He is the One who sent His messenger with the guidance and the system of truth, so that it would expose all other systems. God is sufficient as a witness.*
Edip-Layth (Quran: A Reformist Translation)
Dictionaries
Ejtaal Arabic Almanac: Lane's Lexicon, Hans Wehr, Lisan al-Arab and others
And so, [We punished them* ] for the breaking of their pledge, and their refusal to acknowledge God's messages, and their slaying of prophets against all right, and their boast, "Our hearts are already full of knowledge"- nay, but God has sealed their hearts in result of their denial of the truth, and [now] they believe in but few things - ;*
Has it, then, not become obvious unto those who have inherited the earth in the wake of former generations* that, if We so willed, We could smite them [too] by means of their sins, sealing their hearts so that they cannot hear [the truth]?*
Unto those [earlier] communities - some of whose stories We [now] relate unto thee -there had indeed come apostles of their own with all evidence of the truth; but they would not believe in anything to which they had once given the lie:* thus it is that God seals the hearts of those who deny the truth;
Only they may rightly be reproached who asked thee for exemption even though they were fully able [to go to war].* They were well-pleased to remain with those who were left behind -wherefore God has sealed their hearts, so that they do not know [what they are doing].
AND THEN, after him, We sent forth [other] apostles-each one unto his own people* -and they brought them all evidence of the truth; but they would not believe in anything to which they had once given the lie:* thus it is that We seal the hearts of such as [are wont to] transgress the bounds of what is right.*
such as would call God's messages in question without having any evidence therefor:* [a sin] exceedingly loathsome in the sight of God and of those who have attained to faith. It is in this way that God sets a seal on every arrogant, self-exalting heart."*
Now among those [hapless sinners] are such as [pretend to] listen to thee, [O Muhammad,]* and then, as soon as they leave thy presence, speak [with scorn] unto those who have understood [thy message]:* What is it that he has said just now?" It is such as these whose hearts God has sealed because they [always] followed but their own lusts*
this, because [they profess that] they have attained to faith, whereas* [inwardly] they deny the truth - and so, a seal has been set on their hearts so that they can no longer understand [what is true and what false].*