WORD ORIGIN

Late Middle English from Latin explanare, based on planus ‘plain’

Compare:

Mid-16th century from Latin explicat- ‘unfolded’, from the verb explicare, from ex- ‘out’ + plicare ‘to fold’

explainer,  explaining,  explanation,  explanatory,  self-explanatory,  unexplained
Note these words that are not etymologically related:  explicable,  explicably,  explicate,  explication,  explicit(ly),  explicitness,  inexplicable,  inexplicably.  Note that the OALD and WFF do include (in)explicable and explain in the same word family.
Only available upon request
Only available upon request
Only available upon request