These words are not found in the Pali dictionary.
So I had to guess, and decomposition.
Who is who knows?
Idāneva=> ① Idā+neva, ② Idaṁ+eva
‘‘Idāneva kho mayaṃ, āvuso, āyasmato sāriputtassa bhāsitaṃ evaṃ ājānāma – ‘āyu usmaṃ paṭicca tiṭṭhatī’ti.
hāvuso=> ① ha+āvuso
② Yaṃ hāvuso [yañ+cāvuso (syā. kaṃ. ka.)]
upamāyapidhekacce=> ① upamāya+api+idha+ekacce, ② upamā+āya+api+idha+ekacce
‘‘Tena hāvuso, upamaṃ te karissāmi; upamāyapidhekacce viññū purisā bhāsitassa atthaṃ ājānanti.