أثْقَلَ: جَعَلَهُ ثَقِيلاً to weight, make heavy or heavier, add weight to

أثْقَلَ على، أَثْقَلَ كَاهِلَهُ: أَرْهَقَ to (over)burden, (over)load, weigh down on, bear down on, encumber, oppress, surcharge, overtax; to exhaust, fatigue

أثْقَلَ على: أَزْعَجَ، ضَايَقَ to disturb, trouble, inconvenience, molest, pester, vex, harass, bother, annoy, irritate