 The great number of studies on grammaticalization in the last decade show grammaticalization remains a popular item and is regarded as an important field within linguistic studies in general.Among recent publications there is a wide range of descriptive studies trying to come up with umbrella definitions and exhaustive lists, while others tend to focus more on its nature and significance, questioning the opportunities and boundaries of grammaticalization.An important and popular topic which is still debated is the question of unidirectionality.