PHP

woocommerce get product category name by id

$id = 42;
if( $term = get_term_by( 'id', $id, 'product_cat' ) ){
    echo $term->name;
}

wordpress get product category name by termid

// Testing that $_GET['product-cato'] has been requested and that the product category exists.
if( isset( $_GET['product-cato'] ) && term_exists( intval($_GET['product-cato']), 'product_cat' ) ){
    // Get the corresponding WP_Term object
    $term = get_term( intval($_GET['product-cato']), 'product_cat' );
    //Display the term name for the product category
    echo '<p>' . $term->name . '</p>';
}