their [美 ðɛr, 英 ðɛː]形The translation su agrees in number with the noun which it modifies; their is translated by su, sus, depending on what follows: their father/mother su padre/madre; their books/magazines sus libros/revistas. For their used with parts of the body,
I.this <pl these>[美 ðɪs, 英 ðɪs]代词The Real Academia Española recommends the unaccented forms in all cases of the demonstrative pronoun, which previously took an accent