#016 立ち別れ

立ち別れ
いなばの山の
峰に生ふる
まつとしきかば
今かへりこむ

Tachi wakare inaba no yama no mine ni ōru matsu to shi kikaba ima kaeri komu

Ariwara no Yukihira

if I must depart and leave for Mount Inaba through the growth of pines I'll hear you say "I'm waiting" and will instantly return  (trans. Köy Deli)

tall at our parting on the peak of Mt. Inaba the pines grow when I hear you pine for me I will come home at once  (trans. Jane Reichhold)

Parsing 

Tachi wakare
prefix | part from
Inaba no yama no
Inaba |of |mountain | of
Mine ni ōru
peak | on | grown
Matsu to shi kikaba
pines / waiting | and | if hear
Ima kaeri komu
now | come home | will

Notes:

Kakekotoba (punning 'pivot' word) : matsu = pines and to wait; Inaba as place name and also 'ina' = 'to go to' and 'ba' = hypothetical particle ('if')

tachi	立ち	to stand, erect, rise
wakare	別れ	to depart, parting, bid farewell, part from,
Inaba	いなば	Place name	with word play on ‘ina’ as suffix ‘to go’ ‘journey’ ‘leave’
no	の
yama	山	mountain
mine	峰	peak
ni	に	locative case particle
ouru	生ふる	noun form of verb ‘to grow’
matsu	まつ	1.n. pine tree 2.v. to wait	(kakekotoba)
to shi	とし	and, and the, with, as
kika -ba	きか	hear, heard, ask, inform(ed),
ba	ば	if
ima	今かへりこむ	now, at the present time, immediately,
kaeri	かへり	return, go/come home,	form ofかへる kaeru homecoming, returning home
komu	こむ	aux. verb of intensity ; ‘to do’, will,