Apart from a handful of studies (e.g., Kinney 1956), linguists know little about what variation exists in Hawaiian and what factors constrain the variation. In this paper, we present an analysis of phonetic variation in the word "keia," meaning "this," examining the social, linguistic, and probabilistic factors that constrain the variation. The word "keia" can be pronounced with a constricted glottis (e.g., as creak or a glottal stop) or without one (Pukui & Elbert 1986: 142) and, like many words in Hawaiian, it can undergo phonetic reduction. The analysis was conducted on interviews with eight native-speaking "kupuna" (elders) who were recorded in the 1970s. We find that the likelihood of the word being realized with a constricted glottis decreases if the word immediately following "keia" begins with an oral stop or if the speaker is a man. Additionally, we observe a higher likelihood of phonetic reduction as word sequences ("keia" + the following word(s)) are repeated during the interaction. The results contribute to current models of speech production and planning, and they inform work aimed at supporting the ongoing efforts to conserve and revitalize the Hawaiian language.