先 xiān is 'first (of all)'.

Common word: 先生 'Mr' (in Japanese this word is sensei 'teacher')

水 Shuǐ is 'water':

At the side of a character it is represented by three dots as in:

洗 xǐ 'wash':

Common word: 洗澡 xǐzǎo 'have a shower'