With this Report (here Part I) we present recent bibliographical information and, occasionally, renewed discussion about a series of etymological problems concerning Sanskrit, particularly Vedic, lexicon. Our principal aim is to supplement the Etymologisches Wörterbuch des Altindoarischen by M. Mayrhofer (last Nachträge und Verbesserungen 1999-2000). So, by means of our Report we would like to provide a tool similar, even though more modest in its proposals, to the Chroniques d’étymologie grecque and latine published in the “Revue de Philologie, de Littérature et d’Histoire Anciennes” and based on the etymological dictionaries by Chantraine and Ernout-Meillet, respectively. In close connexion with etymology we also consider problems related to the interpretation of Vedic texts and the reconstruction of cultural realia. The present number includes lexemes from a-1 to áp-.