to go to the bottom of a matter; after all; when all is said and done;
究 · 7 strokes
Phonosemantic compound. 穴 represents the meaning and 九 represents the sound.
竟 · 11 strokes
Depicts a tattoo tool (辛) marking a person's (人) head as punishment for a crime. Based on the original meaning "tattoo criminals on the face", now written as 黥. The current meaning is a phonetic loan.