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thumma
Then
CONJ – coordinating conjunction
Root Link: ث م م
innahum
indeed they
ACC – accusative particle inna + PRON – 3rd person masculine plural object pronoun Ha
Root Link: ا ن ن
laṣālū
(surely) will burn
EMPH – emphatic prefix lām + N – nominative masculine plural active participle
Root Link: ص ل ى
l-jaḥīmi
(in) the Hellfire
DET – determiner prefix al + N – genitive feminine noun 
Root Link: ج ح م

Acknowledgements:

Single-Word Audio has been made possible through software provided by Arabic NLP

James Ada's concordance work; his research can be found at www.organizedQuran.com
Note: James is now a member of the IslamAwakened Continuity Board