1
general::
unsuitable/not suitable
not having the right qualities for a particular person, purpose, or situation:
• These toys are not suitable for children under 3. • The job was considered unsuitable for women. • Some dogs end up in totally unsuitable homes.
not appropriate/inappropriate
not suitable for a particular situation or purpose – used especially about someone's behaviour or language:
• Slang is not appropriate in an academic essay. • Never reward inappropriate behaviour. • It would not be appropriate for us to comment at this stage.
wrong
not the right thing or person for a particular job or purpose:
• You’re using the wrong spoon – this is the soup spoon. • She was simply the wrong person for the job.
out of place
[ not before noun ] not looking or seeming suitable for that place or situation:
• The horse drawn carriage looks a little out of place among the busy traffic. • At first I felt a bit out of place.
incompatible
two ideas or things that are incompatible cannot exist or be done together. Two people who are incompatible are unlikely to have a successful relationship, because they have very different characters, beliefs etc:
• He considered the role of wife and mother to be incompatible with a career. • Why do totally incompatible people get married?
incongruous
formal seeming strange and unsuitable, often in a humorous way, because of being unexpected in a particular situation or very different from its surroundings:
• It seemed incongruous having a dance-band at the funeral. • He was dressed in a three-piece suit with an incongruous tie shaped like a fish.
inconvenient
an inconvenient place or time is not suitable and causes problems for you:
• He always seems to call at inconvenient times. • The new station is inconvenient to pedestrians, because it is a long walk from the centre of town.
unfit
not suitable to be used for something, or not suitable to do something:
• The boat is not only unfit to live in but is actually unsafe. • The meat was declared unfit for human consumption (= not suitable to eat ) . • He claims she is an unfit mother. • A jury decided Pryse-Jones was unfit to stand trial at court because of his mental illness. • The house was unfit for human habitation (= not suitable to live in ) .
Longman-Thesaurus
2
general::
adj. VERBS be, prove | make sth The huge proportions of the main rooms made the house unsuitable for conversion into flats. | consider sth, deem sth, find sth Many tasks were considered unsuitable for women. ADV. highly, most, very | completely, entirely, quite, totally, wholly | manifestly, obviously
Oxford Collocations Dictionary