Modifiers matching obstruction:

• permanent,
• virtual,
• nasal,
• physical,
• large,
• additional,
• insurmountable,
• vertical,
• surrounding,
• upright,
• structural,
• temporary,
• environmental,
• terrestrial,
• solid,
• visual,
• relevant,
• overhead,
• small,
• adjacent,
• irregular,
• layer,
• fixed,
• artificial,
• spatial,
• hazardous,
• local,
• level,
• under,
• low,
• outdoor,
• nearby,
• removable,
• taller,
• natural,
• impenetrable,
• hard,
• indoor,
• major,
• underwater,
• lateral,
• multiple,
• movable,
• immovable,
• featureless,
• urethral,
• isolated,
• lighted,
• clear,
• underground,
• cooler,
• elongated,
• external,
• geographic,
• simple,
• larger,
• unusual,
• raised,
• significant,
• minor,
• short,
• past,
• opaque,
• smaller,
• over,
• metal,
• tall,
• rigid,
• common,
• dense,
• up,
• visible,
• current,
• typical,
• horizontal,
• internal,
• topical,
• bigger,
• linear,
• subsurface,
• mechanical,
• hidden,
• hydraulic,
• electrical,
• discrete,

Simple categories matching hydraulic:

• equipment,
• response,
• integrity,
• load,
• structure,
• machinery,
• disturbance,
• incident,
• situation,
• system,
• ram,
• machine,
• limitation,
• part,
• construction,
• fluid,
• damper,
• project,
• component,
• characteristic,
• connection,
• feature,
• material,
• facility,
• parameter,
• space,
• device,
• process,
• pattern,
• property,
• barrier,
• source,
• control,
• force,
• liquid,
• behaviour,
• actuator,
• works,
• test,
• medium,
• obstruction,
• cylinder,
• pump,
• installation,
• coupling,
• seal,
• fitting,
• condition,
• circuit,
• valve,
• behavior,
• quantity,
• information,
• measure,
• line,
• hardware,
• binder,
• impediment,
• hose,
• means,
• elevator,
• accessory,
• arrangement,
• tool,
• phenomenon,
• loss,
• boundary,
• motor,
• oil,
• unit,
• plant,
• trait,
• instrument,
• closure,
• cement,