To employ one’s mind rationally and objectively in evaluating or dealing with a
given situation.
Etymology (EN): M.E. thinken, variant of thenken, O.E. thencan;
P.Gmc. *thankjan (cf. O.Fris. thinka, O.S. thenkian,
O.H.G. denchen, Ger. denken, Goth. thagkjan).
Etymology (PE): Andišidan, infinitive from andiš-; Mid.Pers. handeš-,
handešidan “to think, consider, reflect,” ultimately from Proto-Iranian
*ham-dis-, from *ham- “together, with, same,” → syn- +
*dis- “form, appearance,” cf. Av. daēs- “to show,” daēsa-
“sign, omen;” Mod.Pers. dis, disé “form, appearance,” variants -diz,
-diš; Mid.Pers. dêsag “form, appearance,” dêsidan
“to form, build;” Sogd. andiš “to seem,” andêš “to show,”
andêšik “appearing;” cf. Skt. deś-
“to show, point out;” PIE *deik- “to show” (cf. Gk. deiknumi “to show,”
dike “manner, custom;” L. dicere “to utter, say;” O.H.G. zeigon,
Ger. zeigen “to show;” O.E. teon “to accuse,” tæcan “to teach”).
