{{alias}}( word )
    Extracts the stem of a given word.

    Parameters
    ----------
    word: string
        Input word.

    Returns
    -------
    out: string
        Word stem.

    Examples
    --------
    > var out = {{alias}}( 'walking' )
    'walk'
    > out = {{alias}}( 'walked' )
    'walk'
    > out = {{alias}}( 'walks' )
    'walk'
    > out = {{alias}}( '' )
    ''

    See Also
    --------