na-adjective
Describes objects that take up a lot of space or are awkward to handle because of their volume.
この荷物は嵩高で運びにくい。
This luggage is bulky and hard to carry.
na-adjective
Describes a person's attitude as arrogant or overbearing; less common than the physical sense.
彼の嵩高な態度には我慢できない。
I can't stand his haughty attitude.
Compound of 嵩 (かさ, 'bulk, volume') and 高 (だか, 'high, large'). The figurative sense 'haughty' likely developed from the idea of an inflated self-importance.