APPROXIMATION has been at the centre of interest in various subfields of linguistics, such as pragmatics and discourse studies, where it has been referred to in different terms, such as ‘mitigation’ (Caffi 2007), ‘indeterminacy’ (Bazzanella 2011), ‘hedging’ (Lakoff 1972) or ‘(intentional) vagueness’ (Channell 1994; Mihatsch 2007; Voghera 2012). Morphological means to convey these meanings have not been studied in great depth however (as compared to other strategies such as particles or discourse markers). To be sure, evaluative morphology is a well-established domain of investigation (see, e.g. Grandi & Körtvélyessy 2015 for a fairly recent survey), but APPROXIMATION has not been as much in focus as other types of evaluation, such as DIMINUTION, AUGMENTATION and INTENSIFICATION (e.g. Jurafsky 1996; Grandi 2002; Schneider 2003; Bakema & Geeraerts 2004; Prieto 2005; Körtvélyessy & Štekauer eds. 2011; Efthymiou 2015; Efthymiou, Fragaki & Markos 2015; Rainer 2015; Napoli 2017). This workshop intends to bridge this gap, by focusing exclusively on APPROXIMATION in word formation, as a follow-up to pioneering publications on morphopragmatics (Dressler & Merlini Barbaresi 1994) and more recent studies of diminutive markers used as attenuation strategies in Italian (Grandi 2017), compounding elements expressing imitation or fakeness in Dutch (Van Goethem & Norde 2020), or approximative meanings of Italian simil- (Masini & Micheli 2020) and English (-)ish (e.g. Oltra-Massuet 2017, Kempf & Eitelmann 2018, Eitelmann, Haugland & Haumann 2020). We understand APPROXIMATION as a complex functional domain including (at least) vagueness, non-prototypicality, attenuation, and fakeness/imitation.