The initial consonant of a Korean syllable. For example, the chosung of '사과' (apple) is 'ㅅㄱ'.

No. Korean has many words sharing the same initial consonants. Any real word matching the shown pattern is accepted.

Since multiple answers are valid, showing one during play would basically give away the answer. Instead, an example for the last unsolved pattern is shown on the game-over screen.

No, base forms of verbs/adjectives (e.g., '먹다', '예쁘다') are excluded — only noun-focused words are accepted.