a letter, a character (symbol for a sound or a word) / (linguistics) script, writing system / (specific to Japanese) a written mora, a kana / writing in general, written words

(literally) snakes and scorpions / (figuratively) abomination, abominable being

Dakota

大豆: soybean

(university slang) During the attendance check, to deceive a lecturer into thinking another person is in attendance by answering for them.

(university slang) During the attendance check, deceiving a lecturer into thinking another person is in attendance by answering for them.

mansion

duct (pipe, tube or canal which carries air or liquid from one place to another)

(formal, literally or figuratively) dirtiness

(formal, literally or figuratively) to be dirty