A verb occurring in the Markirya poem, consists of prefix a- and verb hosta- (gather).
Tolkien noted: "When the bare stem of the verb is used (as after 'see' and 'hear') as infinitive na- [changed to a-] is prefixed if the noun is the object not the subject". In man cenuva lumbor ahosta (changed from na-hosta), "who shall see the clouds gather"
hosta- vb. "gather, collect, assemble" (Markirya), "gather hastily together, pile up" (PE17:39), hostainiéva "will be gathered", future tense of the stative verb *hostainië*, derived from hostaina "gathered", past participle of hosta- "gather". Such stative verbs are probably not conceptually valid in Tolkien's later Quenya; see -ië**. (FS)