Watch yourself, be careful, literally, "keep your health" / take care (used when parting)

fact; truth; reality / (as a) a matter of fact, actually, the fact (of the matter)

police dog

attach, affix, stick, fasten, add, add on, append; set, put, put one thing on another / apply, put on / leave a mark on / write, make an entry / give, impart, direct, direct one's attention

(meteorology) psychrometer

fact-finding

to falsify a fact

mistake of fact

(literary) self-possessed; composed; collected; calm and at ease

to put on (a hat, gloves, etc.) / to wear (a necklace, glasses, etc.) / to carry (a sword, gun, etc.)