Modifiers matching circumstances:

• unforeseen,
• extraordinary,
• persistent,
• negative,
• environmental,
• surrounding,
• personal,
• bad,
• unusual,
• economic,
• complicated,
• catastrophic,
• special,
• operational,
• practical,
• logical,
• driving,
• unique,
• extreme,
• unplanned,
• medical,
• specified,
• terrible,
• under,
• unfortunate,
• serious,
• unexpected,
• unpredictable,
• evaluative,
• outside,
• pathological,
• individual,
• exceptional,
• corporate,
• mundane,
• current,
• external,
• historical,
• physical,
• significant,
• dangerous,
• difficult,
• contextual,
• unanticipated,
• bizarre,
• unavoidable,
• objective,
• tragic,
• distressing,
• institutional,
• adverse,
• harmful,
• unforeseeable,
• stressful,
• relevant,
• social,
• uncontrollable,
• emotional,
• financial,
• domestic,
• good,
• local,
• rare,
• changing,
• clinical,
• limited,
• temporary,
• socioeconomic,
• severe,

Simple categories matching persistent:

• difficulty,
• symptom,
• pollutant,
• condition,
• retrovirus,
• disorder,
• distress,
• infection,
• disease,
• material,
• insecticide,
• organophosphate,
• time,
• pesticide,
• problem,
• mineral,
• substrate,
• information,
• headache,
• pathogen,
• event,
• illness,
• herbicide,
• substance,
• instability,
• virus,
• aggression,
• circumstances,
• injury,
• consequence,
• state,
• organism,
• complaint,
• affliction,
• chemical,
• abnormality,
• upset,
• metal,
• bacteria,
• compound,
• cause,
• volatile,
• lesion,
• pain,
• matter,
• dirt,
• contaminant,
• discomfort,