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sub-
- under, beneath, below, from beneath: submarine, subsolar
- lower in rank, position, or importance than; inferior or subordinate to: subaltern, subhead
- to a lesser degree than, somewhat, slightly: subhuman, subaquatic
- so as to form a division into smaller or less important parts: subdivide
- forming such a division: subspecies
- near, bordering on: subalpine
- nearly, almost: subteen
- Chem.
- with less than the normal amount of (the specified substance): suboxide
- basic: subcarbonate
See sub- in American Heritage Dictionary 4
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