sáftu comes from the Medieval Greek ísa ‘exactly’ and the Lesbian local adverb éftu ‘there’ (Ralli 2017˙ Ralli 2019).
E.g. sáftu t-áfsa. páni pár-tu. ísa-éftu to áfisa. píʝene páre-to. ‘I left it there. Go to take it’.