Rashi on Genesis 24:20/רש"י על בראשית כ״ד:כ׳

1ותער AND SHE EMPTIED — It means “pouring out”. It occurs in this sense many times in the Mishna; e. g., (Avodah Zarah 72a), “He who pours (הטערה) from one vessel into another”, and we find it again in a similar sense in Biblical Hebrew: (Psalms 141:8) “O pour not out (תער) my soul”, and (Isaiah 53:12) “Because he poured forth (הערה) his soul unto death”

2השקת THE TROUGH — a hollowed-out stone from which the camels drink.