a. difficult to use or handle or manage because of size or weight or shape
s. difficult to work or manipulate
a. 难处理的, 笨大难使用的, 笨拙的
1. The large box was too unwieldy for me to carry alone.
这个大箱子对我来说太笨重了，无法单独搬运。
2. She found the unwieldy software difficult to navigate.
她发现这个复杂的软件很难使用。
3. His unwieldy backpack made it hard to walk through the crowded streets.
他笨重的背包让他在拥挤的街道上行走很困难。