至

zhi

to arrive; until

(ut)most;

an arrow 厶 shoot from the ground 土 toward the target (一) until it arrives with an utmost precision

室

shi

room, chamber

house [mian] + arrive/utmost

under the roof the place of the utmost importance is one's own room

刂

dao

knife

the simplified radical form of 刀 when used on the right side of Chinese characters

到

dao

to arrive; to go to (a place)

until (a time)

arrive/utmost (zhi) + knife (dao)

they had to cut through the dense jungle, push themselves to the utmost, and travel far to reach the hidden temple where no one had ever arrived

倒

dao

to fall, to collapse

to invert/reverse

person (ren) + arrive (dao) + knife []

the human factor inverts the arrow up into a bird fall down, 'to reach' into 'to collapse', and the 'arrival' into 'reverse'