冲昏头脑 (chōng hūn tóu nǎo) — to become carried away (by success, power, love, etc.) and lose one's senses; to have one's head turned

Most characters — around four in five — are built this way: one part hints at the meaning, the other at the pronunciation.

This origin belongs to the traditional form 衝; 冲 is its simplified writing.

The simplified 冲 stands for more than one traditional character. In most words (冲, 冲动) it is 衝; in others (冲) it is 沖.

The traditional form 衝 shows 重 inside 行, with 行 as the meaning part and 重 as the sound part; the simplified 冲 is a later shorthand.

Two or more meaningful parts placed together so that their meanings combine into a new one.

昏 combines 日 (sun) with 氏, a part showing lowering or going down. The picture is the sun going down at dusk.

Most characters — around four in five — are built this way: one part hints at the meaning, the other at the pronunciation.

This origin belongs to the traditional form 頭; 头 is its simplified writing.

The traditional form 頭 shows 頁, meaning head, beside 豆 as a sound component; the simplified 头 is a later shorthand.

Two or more meaningful parts placed together so that their meanings combine into a new one.

This origin belongs to the traditional form 腦; 脑 is its simplified writing.

In the traditional form 腦, the older part 匕 was replaced by a flesh part, while 巛 (hair) and 囟 (head; fontanel) stayed. The simplified 脑 is a later abbreviation.