Intra- means within, inside

intracellular (adj) - existing within the cells

intradermal (adj) - within the layers of the skin

intragalactic (adi) - within a galaxy

intramural (adj) - involving students from within the same school

intranasal (adj) - within the nose

intraocular (adj) - within the eye

intrapersonal (adj) - existing or occurring within your own mind

intrapsychic (adj) - within the mind

intrastate (adj) - within the state

intravenous (adj) - within the veins