Translation of "Cumbersome" in Arabic

The huge but cumbersome Vijayanagara  army slowly marched to meet the enemy.  

سار جيش فيجاياناجارا الضخم والمرهق ببطء لمواجهة العدو.

Whatsmore, his heavy guns which were the most cumbersome and difficult part of his army

أسلحته الثقيلة التي كانت الجزء الأكثر تعقيدًا وصعوبة في جيشه