Какая часть речи. После the most, is / are — прилагательное: the most recognisable cats, a bowl is unhealthy. После a / their / in — существительное: a popular belief, their personalities, in reality. Перед прилагательным — наречие: typically kind, surprisingly long. После are … by — глагол в пассиве: are characterised by.

Существительные. -ity / -ality: real → reality, person → personality, мн. ч. — personalities (y → ies). ve → f: believe → belief, мн. ч. beliefs. Люди: science → scientist (-ist, e выпадает), believe → believer.

Прилагательные и глаголы. -able: recognise → recognisable, believe → unbelievable (e выпадает). -ic: science → scientific. -istic: real → realistic. -y: health → healthy. -ful: play → playful. Глагол -ise / -ize: character → characterise, real → realise. Британское -ise и американское -ize — оба верны.

Отрицание и наречия. un-: healthy → unhealthy, scientific → unscientific, realistic → unrealistic, recognisable → unrecognisable. Наречие: typical → typically, surprising → surprisingly, healthy → healthily (y → i), scientific → scientifically (-ic → -ically). В бланк — одно слово.