The compound adjective 'well-considered' is a transparent English formation. Its first element, 'well', is an ancient Germanic adverb meaning 'in a good manner' or 'thoroughly', used here to intensify the action of the verb it modifies. The core verb 'consider' originates from Latin considerare, which literally meant 'to observe the stars' (from con- 'with' + sidus 'star'), evolving to mean 'to contemplate or think carefully'. The suffix '-ed' marks the past participle, a common Germanic-derived method for converting verbal action into an adjectival state describing something that 'has been' thoroughly thought about. Thus, the word's logic is a direct, literal combination of its parts: something that has been thought about thoroughly and well.

Structure: well (thoroughly) + consider (think about) + ed (adjective suffix) - well: From Old English wel (in a good way, thoroughly). An adverb used here as an intensifying prefix. - consider: From Latin considerare (to examine, observe). The verb root forming the core meaning. - ed: From Old English -ed, -od, a suffix forming past participles, which in English frequently function as adjectives.