WHOLE CHARACTER
实shí
full; solid; true; real; honest; fruit; seed; rich; substantial
实 is what is real and full: 实话 'true words', 现实 'reality', 果实 'fruit'. 老实 means honest.
ZDIC: 会意,从宀、从贯 — the old 實 put 贯 (guàn, strings of cash) under a roof: full. The simplified bottom writes 头 instead.
TOP: THE ROOF SIDE (ZDIC: 从宀)
宀mián
covered house; shelter
Often called the roof component. Its dictionary meaning concerns a covered house; its role in this character is shown below.
In 实: top: the roof side (ZDIC: 从宀) Shown with its documented or clearly limited role.
BOTTOM: THE WRITTEN BOTTOM, SHAPED LIKE 头
头tóu
head
Shown as the lower piece in 买 as a visual aid only; the historical account belongs to the older 買.
In 实: bottom: the written bottom, shaped like 头 The old 贯 is replaced in the simplified form; no role is claimed for 头 here.