walahadaynāhum
And We would have guided them
CONJ – prefixed conjunction wa (and) + EMPH – emphatic prefix lām + V – 1st person plural perfect verb + PRON – 1st person plural object pronoun nā + PRON – 3rd person masculine plural object pronoun Ha
Root Link: ه د ى
mus'taqīman
straight
ADJ – accusative masculine indefinite (form X) active participle
Root Link: ق و م