noun
A general term for anything that blocks sunlight, such as a window blind, an awning, or a sunshade attached to a building or vehicle.
窓に日よけを付けて、部屋が涼しくなった。
I put a sunshade on the window, and the room became cooler.
店の前に日よけのオーニングが設置されている。
A sunshade awning is installed in front of the shop.
noun
Specifically a handheld parasol used to block the sun, as opposed to a rain umbrella.
夏の散歩には日よけのパラソルが欠かせない。
A parasol is essential for a summer walk.
Compound of 日 (hi, 'sun') + よけ (yoke, 'avoiding, protection'), from the verb よける (yokeru, 'to avoid').