degenerate - having lost the physical, mental, or moral qualities considered normal and desirable; showing evidence of decline.

ex: their relationship has gradually degenerate because of lack of communication.

implausible - (of an argument or statement) not seeming reasonable or probable; failing to convince.

ex: students who give an implausible excuse to the teacher won't get any credit.

incoherent - (of spoken or written language) expressed in an incomprehensible or confusing way; unclear.

ex: her essay is too incoherent

intercede - intervene on behalf of another.

ex: jennie intercedes in her parents argument because she couldn't stand it anymore.

intricate - very complicated or detailed.

ex: I like intricate designs.

sanctuary - a place of refuge or safety. / a nature reserve.

ex: his hidden sanctuary is still nowhere to be found no matter how hard she tries to find it.

scrutiny - critical observation or examination.

ex: every medical students were placed under scrutiny.

sinister - giving the impression that something harmful or evil is happening or will happen.

ex: The duck had a sinister gleam in his eye as he thought of his awful plans.

suffice - be enough or adequate. / meet the needs of.

ex: a quick look should suffice

vulnerable - susceptible to physical or emotional attack or harm.

ex: children are the most vulnerable in the society.