WHOLE CHARACTER
留liú
to stay; to remain in a place; to keep one's attention on (留心,留意); to hold someone back; to keep from leaving; to keep; to preserve; to save
留 means to stay or keep: 留学 'study abroad', 保留 'keep', 留意 'pay attention'.
ZDIC header: 形声; the detail section: 会意,从田、从丣,丣亦声 (yǒu) — the field as the place one stays, 丣 as form and old sound. The old 丣 survives only as the fused modern top; its left half has no usable font form, so the top is taught as one fused piece.
TOP: THE FUSED HEAD — THE OLD PIECE 丣 (YǑU), FORM-AND-SOUND SIDE, NOW WRITTEN AS ONE SHAPE
Component group
Notice this part of the shape; it is not taught as a separate word in this lesson.
In 留: top: the fused head — the old piece 丣 (yǒu), form-and-sound side, now written as one shape A fused shape, not a standalone word; only its right half is cleanly identifiable.
BOTTOM: THE FIELD SIDE — THE PLACE ONE STAYS (ZDIC 从田)
田tián
field; farmland
Standalone meaning is kept separate from its role in other characters.
In 留: bottom: the field side — the place one stays (ZDIC 从田) Shown with its documented or clearly limited role.