Tuck is used after these nouns:
tummy

carefully, discreetly, neatly
gently
firmly
tightly
knees tucked tightly against her chest

cosily/cozily, safely, snugly
The children were safely tucked up in bed.

securely
He had securely tucked his phone away in his pocket.

away, in, up
The boys tucked their shirts in.

behind
The pool was tucked away behind a screen of trees.

beneath
the pillow that was gently tucked beneath her head

between
a puppy with its tail tucked between its legs

inside
He tucked the map inside his shirt.

into
He tucked his jeans neatly into his boots.

under, underneath
She tucked the newspaper under her arm.

Tuck is used with these nouns as the object:
knee, napkin, strand