This book is the first collective volume specifically devoted to the multifaceted phenomenon of intensification, which has been traditionally regarded as related to the expression of degree, scaling a quality downwards or upwards. In spite of the large amount of studies on intensifiers, there is still a need for the characterization of intensification as a distinct functional category in the domain of modification. The eighteen papers of the volume contribute to this aim with a new approach (mainly corpus-based). They focus on intensification from different perspectives (both synchronic and diachronic) and theoretical frameworks, concern ancient languages (Hittite, Greek, Latin) and modern languages (mainly Italian, German, English, Kiswahili), and involve different levels of analysis. They also identify and examine different types of intensifiers, applied to different forms and structures, such as adverbs, adjectives, evaluative affixes, discourse markers, reduplication, exclamative clauses, coordination, prosodic elements, and shed light on issues which have not been extensively studied so far.