Hamper and tamper rhyme and mean quite different things. To hamper is to hinder — to make something harder or slower, the way bad weather hampers a search. To tamper is to interfere with something secretly so it no longer works honestly: tampering with a lock, a meter, evidence. Hamper slows progress in the open; tamper corrupts a trusted thing in the dark — and it always takes 'with'.
The grammar separates them before the meaning does. Hamper takes a plain object — bad weather hampers the search, red tape hampers small firms — and describes friction on something trying to get done. Tamper cannot take an object at all: it needs 'with', and what follows is always something that was supposed to be reliable. That preposition is doing real work, because it marks interference from outside by someone who had no business touching it. Nothing is slowed by tampering; something is quietly made to lie.
hamper
To hamper is to make something harder to do — to clog, drag on, or get in the way so that progress is slowed rather than stopped. Thick fog hampers a search; heavy bags hamper a traveller; red tape hampers reform. The word suggests friction and encumbrance: the effort still moves forward, but everything about it now costs more and takes longer because something keeps catching at it from the side.
tamper
To tamper is to meddle where you have no right — quietly, and to someone's cost. The verb is inseparable from its preposition: you tamper WITH a lock, with evidence, with the brakes, and the phrase always implies interference that is unauthorised, hidden, and corrupting. A sixteenth-century variant of temper ('to mix, to work upon'), it kept the working and lost the innocence. The modern world writes the word onto its packaging: a tamper-evident seal cannot stop the interference, but it makes sure the interference shows.
| hamper | tamper | |
|---|---|---|
| Meaning | hinder; make slower or harder | interfere secretly so it misbehaves |
| Grammar | plain object — hamper the search | always tamper WITH something |
| Visibility | open — everyone sees the obstacle | covert — that is the point |
| Wrongdoing? | no — weather can hamper | yes, always |
| The object | efforts, progress, a search, growth | evidence, a lock, a meter, a witness |
| Also a noun | yes — a laundry or picnic hamper | no |
The jammed gears and the doctored scale. Hamper is the wrench in the works: everyone can see the problem, nothing is hidden, and the machine still turns — just badly, and slowly. Tamper is the two quiet quarter-turns: the machine runs perfectly afterwards and gives the wrong answer, and the whole point was that nobody saw it happen. Ask whether something is being slowed or being corrupted. Slowed, openly: hamper. Corrupted, secretly: tamper.
hamper
- iHeavy fog hampered the search for two days.
- iiA shortage of staff hampered the rollout all summer.
- iiiNothing should hamper the flow of aid across the border.
tamper
- iSomeone had tampered with the lock.
- iiHe was charged with tampering with evidence.
- iiiThe seal proves nobody has tampered with the contents.
Tamper's compounds all exist to guard against it — tamper-proof, tamper-evident, tamper-resistant — and the middle one is the most telling. A tamper-evident seal does not prevent interference; it makes interference visible, which is a direct answer to the word's defining problem. Nothing analogous exists for hamper, because an obstacle in the way was never hidden in the first place. Tamper's other look-alike, taper, is drawn on its own page in the 'Related' list below.
Hamper is the exam-useful half, and the passive is its natural shape: 'the rescue was hampered by heavy snow', 'progress has been hampered by funding cuts' — a clean way to name an obstacle in Task 2 or in a report. Tamper is narrower and mostly appears in reading passages about crime, security and data integrity, where the marked error is treating it as transitive: 'tamper the results' is wrong, and 'tamper with the results' is the only shape it takes.