Palindrome in Python - result always false

[buran]

it works for me when indentation is correct

def is_palindrome(word):
    word_start = ''
    for letter in word:
        word_start = letter + word_start
        if word == word_start:
            return True
 
    return False

for word in ['radar', 'blabla']:
    print(f"{word} ==> {is_palindrome(word)}")

Output:
radar ==> True
blabla ==> False

and for improvements, well

def is_palindrome(word):
    return word == word[::-1]