wise

• adj.賢明な、知的な、学識のある
• vt.知らせる；教える
• vi. 理解する
• n. （ワイズ）人名；（英）ワイズ

PIE *weid, see, knowから、語源的にはvisit, videoと同じで、派生的にwise。

wise

wise: English has two distinct words wise, but they come from the same ultimate source: the Indo-European base *woid-, *weid-, *wid-. This denoted ‘see’, and hence ‘know’, and it also produced English idea, vision, and wit. From it was formed the past participial adjective *wīttos, which passed into prehistoric Germanic as *wīsaz ‘knowing things, learned’.

And this has since evolved into German weise, Dutch wijs, Swedish and Danish vis, and English wise. Wisdom [OE] and wizard are derivatives. Meanwhile, another derivative of the same prehistoric base was the Germanic noun *wīsōn, *wīsō, whose original meaning ‘appearance’ (going back to the ancestral ‘see’ of the base) had developed via ‘for, shape’ and ‘kind, sort’ to ‘way, manner’.

This produced German weise, Dutch wijze, Swedish and Danish vis (used largely in compounds and phrases), and English wise (similarly nowadays restricted mainly to compounds, such as likewise and otherwise). Guise is ultimately the same word, filtered through Old French.
=> guise, idea, vision, wit, wizard

wise (adj.)

Old English wis "learned, sagacious, cunning; sane; prudent, discreet; experienced; having the power of discerning and judging rightly," from Proto-Germanic *wissaz (cognates: Old Saxon, Old Frisian wis, Old Norse viss, Dutch wijs, German weise "wise"), from past participle adjective *wittos of PIE root *weid- "to see," hence "to know" (see vision). Modern slang meaning "aware, cunning" first attested 1896. Related to the source of Old English witan "to know, wit."

A wise man has no extensive knowledge; He who has extensive knowledge is not a wise man. [Lao-tzu, "Tao te Ching," c. 550 B.C.E.]

Wise man was in Old English. Wise guy is attested from 1896, American English; wise-ass (n.) by 1966, American English (probably a literal sense is intended by the phrase in the 1607 comedy "Westward Hoe" by Dekker and Webster). Wisenheimer, with mock German or Yiddish surname suffix, first recorded 1904.

wise (n.)

"way of proceeding, manner," Old English wise "way, fashion, custom, habit, manner; condition, state, circumstance," from Proto-Germanic *wison "appearance, form, manner" (see wise (adj.)). Compare Old Saxon wisa, Old Frisian wis, Danish vis, Middle Dutch wise, Dutch wijs, Old High German wisa, German Weise "way, manner." Most common in English now as a word-forming element (as in likewise, clockwise); the adverbial -wise has been used thus since Old English. For sense evolution from "to see" to "way of proceeding," compare cognate Greek eidos "form, shape, kind," also "course of action." Ground sense is "to see/know the way."

wise (v.)

Old English wisean "make wise or knowing" (transitive), cognate with Old Frisian wisa, Old Saxon wisian, Middle Dutch wisen, Dutch wijzen, Old High German wisan, German weisen; from the source of wise (adj.). Intransitive wise up is attested by 1905.

1. They might be wise to stop advertising on on television.

彼らはテレビで広告をするのをやめてもいい。それは賢明なことかもしれない。

2.It is wise to seek help and counsel as soon as possible.

できるだけ早く助けとアドバイスを求めるのは賢明なことだ。

3.They may be wise to err on the side of caution.

彼らが慎重すぎるのは賢明かもしれない。

4.Career- wise ，this illness couldn 't have come at a worse time.

事業を考えると、この病気は最も時ではない。

5.You 're a wise old man:tell me what to do.

あなたは賢明な長者です：どうすればいいか教えてください。