snapshot / to take a photo; to record a video

nothing / nothingness / none / nil / not

nothing, nothingness / (Buddhism) mu; the null set: neither yes nor no (in response to a koan or other question that mistakenly assumes an affirmative or negative answer).

pay respects / reverently

have a disease; disease / being stiff and not able to move / difficult / suffer / make one suffer

to laugh; laughter / to smile; a smile

look at / confront

be mindful of / be prudent

(chemistry) chromium

to block, thwart / steep