一頭霧水

The number one; single; a; as soon as; entire; whole; all; a "one" radical in Chinese characters; also used for clarity when spelling out numbers.

The top part of the body; hair; a leader or boss; the beginning or end of something; a suffix for nouns, verbs, adjectives, or location words.

fog; mist; vapor; fine spray; a phenomenon of water vapor condensing into tiny water droplets or ice crystals near the ground, causing low visibility.

Water; liquid; juice; river; to swim; surname Shui; additional cost or income; lacking substance; shoddy.