If they gain dominance over you, they would be [i.e., behave] to you as enemies and extend against you their hands and their tongues with evil, and they wish you would disbelieve.
يَثۡقَفُوكُمۡthey gain dominance over youyathqafūkum
يَكُونُواْthey would beyakūnū
لَكُمۡto youlakum
أَعۡدَآءٗenemiesaʿdāan
وَيَبۡسُطُوٓاْand extendwayabsuṭū
إِلَيۡكُمۡagainst youilaykum
أَيۡدِيَهُمۡtheir handsaydiyahum
وَأَلۡسِنَتَهُمand their tongueswa-alsinatahum
بِٱلسُّوٓءِwith evilbil-sūi
وَوَدُّواْand they desirewawaddū
لَوۡthatlaw
تَكۡفُرُونَyou would disbelievetakfurūna
Tafsir
If they get their chance, they will disclose the enmity they harbour in their hearts towards you and will stretch their hands out to you to harm and beat you, while swearing and abusing you with their tongues. They will also desire that you disbelieve in Allah and His Messenger so that you become just like them.