parkere

One of the small set of Esperanto adverbs that are lemmas in their own right. Most -e words on this site are adverbs derived from an adjective you already know, and the site does not give those separate pages. Parkere is different, and so is aliflanke: it is listed in dictionaries as a word, because there is no parkera sitting behind it doing the real work. The root is parker- and the -e is simply the ending that makes an adverb of it.

Where it came from is the whole story. French says par coeur for by heart, and Esperanto swallowed the phrase in one gulp: par plus coeur became parker-, a single indivisible root. So a French speaker can hear the heart inside the word and an Esperanto speaker cannot, because koro is not in there as a piece of grammar. This is the same gift, and the same trap, as procento, where the Latin per centum is genuinely visible in the word and genuinely not Esperanto morphology. Real history, false grammar.

The family is small and useful. Parkerigi is to memorise something, to learn it by heart: mi parkerigis la kanton. Parkerigo is the memorising itself, the thing language teachers argue about. There is no parkero, so do not build one; the root only comes out as the adverb and its -ig- verb. And the plain alternative is always available: scii ion memore or simply memori.