to take hold of; to grab; to seize, to take (an illegal product), to capture; to grasp mentally; understand; to capture (screen or data); to type (something) into a computer; to input
“Sur votre smartphone ou votre tablette, saisissez «didierfle.app» dans votre navigateur.” — In your smartphone or tablet browser, type "didierfle.app".
Inherited from Middle French saisir, from Old French saisir, seisir (whence English seize), from Early Medieval Latin sacīre (“lay claim to, take seisin”), from Frankish *sakjan (“to sue, litigate; accuse”). Compare Old English sacian (“to strive, brawl”), Faroese saka (“to hurt; accuse”), obsolete English sake (“strife”). Alternatively Old French saisir, seisir may be borrowed from Old High German *sazjan and thus cognate to German setzen (“to set”) and Gothic 𐍃𐌰𐍄𐌾𐌰𐌽 (satjan).