firmament : (m.) ākāsa; (nt.) nabha, antalikkha.

A.P. Buddhadatta Mahathera, Concise Pali-English and English-Pali Dictionary [available as digital version from Metta Net, Sri Lanka]

nam mkha'

[translation-san] {LCh,C,MSA} ākāśa

[translation-san] {C} abhyavakāśa

[translation-san] {C} kha

[translation-san] {C} gagana

[translation-eng] {Hopkins} space; sky

[translation-eng] {C} open space; open place; empty space; firmament

Jeffrey Hopkins' Tibetan-Sanskrit-English Dictionary

nam mkha' la

[translation-san] {C} vaihāyasa(m)

[translation-san] {C} antarīkṣa

[translation-eng] {Hopkins} in space; in the sky

[translation-eng] {C} nto the air; intermediate space/realm; air; firmament

Jeffrey Hopkins' Tibetan-Sanskrit-English Dictionary

nam mkhar

[translation-san] {C} gagana

[translation-eng] {Hopkins} in the sky; in space

[translation-eng] {C} sky; firmament

Jeffrey Hopkins' Tibetan-Sanskrit-English Dictionary