One of our more inexplicable habits is the tendency to keep the Anglo-Saxon noun but to adopt a foreign form for the adjectival form. Thus fingers are not fingerish; they are digital. Eyes are not eyeish; they are ocular. English is unique in this tendency to marry a native noun to an adopted adjective. Among other such pairs are mouth/oral, book/literary, water/aquatic, house/domestic, moon/lunar, son/filial, sun/solar, town/urban. This is yet another perennial source of puzzlement for anyone learning English. Sometimes, a Latinate adjective was adopted but the native one kept as well, so
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