This verb originally meant "to draw", e.g.
וַתְּמַהֵ֗ר וַתְּעַ֤ר כַּדָּהּ֙ אֶל־הַשֹּׁ֔קֶת וַתָּ֥רׇץ ע֛וֹד אֶֽל־הַבְּאֵ֖ר
לִשְׁאֹ֑ב וַתִּשְׁאַ֖ב לְכׇל־גְּמַלָּֽיו׃
(בראשית כד כ)
'And (then) she hastened and (then) she uncovered her pitcher to the watering channel and (then) she ran to the pit/well in order
to draw and (then) she drew for all of her camels.'
It makes sense that in modern Hebrew it would mean 'to vacuum' because when you vacuum you are, in a way, drawing dust.
