dumb
adj.adj. describes a device that is not 'smart' because it lacks its own computer or internet connection. For example, a 'dumb phone' can only make calls, while a smartphone can run apps.
adj. lacking independent processing power or advanced electronic features, such as internet connectivity. The term is used to contrast simple devices with their 'smart' counterparts.
My old phone is a dumb phone.
In a secure facility, employees might use a dumb terminal that only connects to a central server.
While smart homes are becoming standard, there's a growing market for 'dumb' appliances that perform a single function reliably without needing software updates or an internet connection.
From Middle English dumb (“silent, speechless, mute, ineffectual”), from Old English dumb (“silent, speechless, mute, unable to speak”), from Proto-West Germanic dumb, from Proto-Germanic dumbaz (“dull, dumb”), from Proto-Indo-European *dʰewbʰ- (“to whisk, smoke, darken, obscure”). The senses of stupid, unintellectual, and pointless, which are found regularly since the 19th century only, probably developed under the influence of German dumm and Dutch dom. Just like the English word, these originally meant "lacking the power of speech", but they developed the mentioned senses early on. Cognates Cognate with Scots dumb (“dumb, silent”), North Frisian dom, domme (“dumb, stupid”), West Frisian dom (“dumb, stupid”), Dutch dom (“dumb, stupid”), German dumm (“dumb, stupid”), Danish dum (“stupid”), Swedish dum (“stupid”), Icelandic dumbur (“dumb, mute”). See also deaf.
From Middle English dumben, from Old English dumbian (found in the compound ādumbian (“to become mute or dumb; keep silence; hold one’s peace”)), from Proto-Germanic dumbijaną, dumbōną (“to be silent, become dumb”), from Proto-Indo-European dʰewbʰ- (“to whisk, smoke, darken, obscure”). Cognate with German verdummen (“to become dumb”).
A minced oath of damn.