This is the 4843rd most frequent Catalan word.
sumi
The Catalan word "sumi" is a conjugation of the verb "sumir," meaning "to plunge" or "to sink."
Here, 'sumi' uses the subjunctive form of 'sumar,' which is 'to add,' focusing on mathematical addition in the third person singular.
Que ell sumi tots els números per acabar el càlcul.
Let him add up all the numbers to finish the calculation.
In this usage, 'sumi' is subjunctive for 'sumar,' used in a hypothetical context regarding contributions in discussion.
Si ella sumi a la discussió, tindrem més perspectives.
If she contributes to the discussion, we will have more perspectives.
In this sentence, 'sumi' is the subjunctive form of the verb 'sumar' meaning 'to contribute or add' in the first person singular.