Combine and divide are clean opposites. Combine is to bring separate things together into one set. Divide is to split a whole into parts or shares. Combine turns many into one; divide turns one into many. They are the two directions of the same operation.
These two are opposites in the plainest way. Combine gathers separate things into one; divide splits one thing into parts. You combine the ingredients into a batter, then divide the batter between two tins. In arithmetic they even undo each other in spirit — bringing together versus parcelling out. Combine builds a whole from parts; divide breaks a whole into shares.
combine
To combine is to bring two or more things together so they work or count as one — combine ingredients, combine forces, combine two datasets. From the Latin com- 'together' and bini 'two by two'. What is combined is pooled for a purpose, but the parts often stay distinguishable, unlike things that merge or fuse into a single body. As a noun, with the stress moved to the front, a combine is the farm machine that combines reaping, threshing, and gathering into one pass.
divide
To divide is to split a whole into parts — often equal ones, and often methodically: divide a cake into six, divide the class into groups, divide twelve by three. From the Latin dividere, 'to force apart'. It is the tidy, measured cousin of split. As a noun, a divide is a gap or rift between groups — the digital divide, a widening social divide. The word reaches into maths (dividend, divisor) and into the old strategy of divide and conquer.
| combine | divide | |
|---|---|---|
| Meaning | bring things together into one set | split a whole into parts or shares |
| Direction | many into one | one into many |
| Starts with | several separate things | one whole thing |
| Often with | ingredients, forces, ideas, data | land, money, a class, opinion |
| Noun | combination | division |
| Example | Combine the two lists. | Divide the profit three ways. |
Count the pieces before and after. Combine starts with several and ends with one — two piles become one bowl. Divide starts with one and ends with several — one pie becomes six wedges. If separate things are brought together into a whole, that is combine; if a whole is split into parts or shares, that is divide. They are the same operation run in reverse.
combine
- iCombine the two departments into a single team.
- iiThe recipe combines sweet and salty flavours.
- iiiThey combined their resources to fund the trip.
divide
- iDivide the class into groups of four.
- iiThe estate was divided equally among the heirs.
- iiiA wide river divides the city into two halves.
Both are usually transitive: you combine things, and you divide something. Divide has a figurative sense combine lacks — to set people against each other ('a divided nation') — while combine stays neutral, about bringing together. In maths they are near-opposite everyday operations, though technically division is the inverse of multiplication.
A core opposites pair for data, maths and society topics. Reach for combine when several things are brought into one — 'combine the datasets', 'combine the two roles' — and divide when a whole is split into parts or when something causes conflict — 'divide the sample into groups', 'the issue divided the country'. Both take an object; combine takes 'with', divide takes 'into', 'among' or 'between'. The nouns combination and division are common in academic writing, and divide is also a noun ('the digital divide').