A man to his sister - Ani ohev ot'cha, akhoti ( ×× ×™ ×והב ×ותך ×חותי)
A woman to her sister - Ani ohevet ot'cha, akhoti (×× ×™ ×והבת ×ותך ×חותי )
sister = achót (אחות)it's the same word in both Biblical Hebrew and Modern Hebrew.
The Hebrew word for "love" is "ahava," pronounced "a-ha-VAH."
sister and brother = achot veh ach (×חות ו××—)
akhot (אחות) (kh is a gutteral sound).
ahava po (אהבה פה)
if you are male, your love = ahava shelkha if you are female, your love = ahava shelakh
You can say "Ikh lib mayn kleyne shvester" in Yiddish to express "I love my little sister."
ahkhot leebee (אחות ליבי)
ahavat re'enu אהבת ×¨×¢× ×•
ahavat em (אהבת אם)
beh-ah-hah-VAH (באהבה)
אני אוהב אמנות