frati -fra- gismu

x₁ reacts/responds/answers with action x₂ to stimulus x₃ under conditions x₄; x₁ is responsive.

x₃ stimulates x₁ into reaction x₂, x₃ stimulates reaction x₂ (= terfra for place reordering); attempt to stimulate, prod (= terfratoi, tunterfratoi). See also preti, danfu, spuda, cpedu, tarti.

In notes:

cpedu: x₁ requests/asks/petitions/solicits for x₂ of/from x₃ in manner/form x₄.
danfu: x₁ is the answer/response/solution/[reply] to question/problem x₂.
preti: x₁ (quoted text) is a question/query about subject x₂ by questioner x₃ to audience x₄.
spuda: x₁ answers/replies to/responds to person/object/event/situation/stimulus x₂ with response x₃.
tarti: x₁ behaves/conducts oneself as/in-manner x₂ (event/property) under conditions x₃.
glefra: f₁ reacts with orgasm f₂ to stimulus f₃ under conditions f₄; f₁ orgasms.
terfra: f₃ incites reaction f₂ from reactor f₁ under condition f₄.
tolfragapci: x₁=t₁=g₁ is inert gas of material/composition including x₂=g₂, under conditions x₃=g₃.
fidna: x₁ pretends/feigns that x₂ is true in activity x₃; x₁ does x₃ as though x₂ were true
sma'ara: x₁ experiences ASMR (Autonomous Sensory Meridian Response).