hollow
Cross references:
1. vain
hol.low \'ha:l-(.)o-, -*(-w)\ \'ha:l-o--le-, -*-le-\ aj [ME holw, holh, fr.
holh hole, den, fr. OE holh hole, h]ollow - more at HOLE 1a: CONCAVE,
SUNKEN 1b: marked by sunken areas 2a: having a cavity within {~ tree}
2b: devoid of value or significance {~ victory} 3: reverberating like a
sound made in or by beating on a large empty enclo sure : MUFFLED 4: FALSE,
DECEITFUL {~ promises} - hollow vb
Webster's English Dictionary