adventitious (from an external source) · adventitious (accidental, additional, appearing casually) · adventitious (developing in an unusual place or from an unusual source)
köken: Inherited from Old Swedish ogräs. Affix of o- (“non-”) + gräs (“grass”). According to SO attested since latter half of the 15th century. Compare Norwegian Bokmål ugress, ugras, Norwegian Nynorsk ugras and Danish ugræs.
occasional, special, party, fashion (created for a specific occasion) · occasional, incidental, casual, ad hoc, chance (coming without regularity; employed irregularly)
çekim: karşılaştırma alkalmibb · üstünlük legalkalmibb
köken: From the alkalm- stem of alkalom (“occasion”) + -i (adjective-forming suffix).
köken: From Middle Low German unkrūt, a compound of un- (“un-”) + krūt (“vegetables”), compare German Unkraut. The second part of the word is also borrowed to Danish krudt (“gunpowder”).