haitalliseksi

Haitalliseksi is a Finnish translative adjective form that expresses a change into a harmful state or describes something that has become harmful. It is the translative form of haitallinen, meaning harmful or detrimental. The root haitta means harm or damage, and the suffix -llinen turns haitta into the adjective haitallinen; adding the translative -ksi yields haitalliseksi to indicate becoming or turning into that state.

In use, haitalliseksi appears with verbs that denote change, such as tulla (to become) or muuttua (to change into). Examples include: Se on muuttunut haitalliseksi seurausten vuoksi. It can also be used to refer to something that has been deemed harmful, as in haitalliseksi katsottu aine, meaning an element deemed harmful. A common construction is Se voi muuttua haitalliseksi, jos sitä käytetään väärin.

Etymologically and grammatically, haitalliseksi is part of the sama word family as haitallinen (harmful) and haitta (harm). The translative marker -ksi communicates transition to that state, and it contrasts with the competing forms haitallinen (predicative) or haitallisuutta (noun form haitallisuus) used in different syntactic contexts.

Context and register: haitalliseksi is frequently found in health, consumer safety, and environmental risk language, where substances, practices, or policies may be described as having become harmful. It remains distinct from the noun haitallisuus (harmfulness) and from haitallinen in its bare adjectival sense.

See also: haitallinen, haitta, haittavaikutus, translative case, Finnish grammar.