You can add up to 50 words at a time by pasting a table instead of filling in cards one by one.
On the first step, paste the rows and say how they are separated: rows by a new line or a semicolon, columns by a tab, a comma or a hyphen.
A comma inside an example sentence will split that sentence into two columns. If your examples contain commas, separate the columns with a tab.
On the second step, say which column is which: the word, its translation, meaning, synonym, antonym, and up to two example sentences.
Mark the practised word in every example with double parentheses. Two opening and two closing, around the word or phrase the exercise should ask for:
I ((went)) to school.
Without them the row is flagged and nothing is created until you fix it — the platform has no other way to know which word in the sentence is the one being practised. You can correct the cell in the table before saving.
An example cell may be left empty; a word cell may not. Anything past the 50th row is dropped.