The word "sri" uses 3 letters: irs.
sri is a valid word in this word list. For a definition, see the external dictionary links below.
Direct anagrams of sri:
Words formed by adding one letter before or after sri (in bold), or to irs in any order:
a - airs rias sari b - bris ribs c - cris f - firs rifs e - ires reis rise sire i - iris k - irks kirs kris risk m - mirs rims d - rids g - rigs n - rins p - rips h - shri s - sirs sris o - sori t - stir