import re


def contains_reserved_char(word: str):
    """
        The following reserved chars are not permitted at all:
        < (less than)
        > (greater than)
        : (colon)
        " (double quote)
        / (forward slash)
        \\ (single backslash (escaped here))
        | (vertical bar or pipe)
        ? (question mark)
        * (asterisk)
    """
    # single backslash, vertical bar, question mark and asterisk are escaped
    return re.match(r'\S*(<+|>+|:+|"+|/+|\\+|\|+|\?+|\*+)', word) is not None