Pronominal form for the second (as 'you') and third (as 'they/them') persons in plural of the imperfect past tense of the indicative mode for the verb to fan . See verbs/aventaban .
AVENT-BANSE reflexive form of the third plural oersona of the indefinite preterite of the verb AVENTAR , 1 . throw in the wind, to separate the straw from the grain, for example. 2 . Push, move the wind something