In a manner involving choice or selection; by means of electing or choosing.
From 'elective' (adjective meaning 'optional' or 'involving choice') plus the adverb suffix '-ly'. The adjective 'elective' comes from Latin 'electivus,' related to 'eligere' (to choose).
This adverb is rarely used in modern English because we have simpler alternatives like 'optionally' or 'selectively.' But it captures something precise: choice made through a formal voting or selection process, not just casual preference.
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